What is the difference between hips and pelvis




















Onset can also be gradual, commonly related to sustained pressure from sitting or local muscle forces. Your Hip Pain Professional can reduce your pain associated with coccydynia by addressing factors such as:. Pain around the hip and pelvis may also be related to soft tissues Figure 2. Soft tissues are non-bony structures that connect, support, or surround other structures and include:. There are many muscles that support and move the hip and pelvis.

The soft tissues located in each of the main areas of our hip and pelvis will be discussed below. This information can also be found by selecting your specific area of pain or difficulty on our Pain Locator Map. The muscles that sit at the front of the hip are called the hip flexors Figure 2. The main hip flexor, the iliopsoas muscle is made up of two parts — the psoas muscle that starts at the lumbar spine, and the iliacus that starts from the inside of the pelvis.

They come together in the pelvis and run forwards over the front of the pelvis, deep across the front of the hip and join onto the upper thigh bone femur. The iliopsoas muscle provides important support for the front of the hip joint, the sacroiliac joint of the pelvis and the lower back lumbar spine. It is also a powerhouse for moving your legs forward in walking, running and stairclimbing. A number of other longer, more superficial closer to the surface hip flexor muscles run from the pelvis and down into the thigh and connect below the knee — the Sartorius, Rectus Femoris and Tensor Fascia Lata TFL muscles Figure 2.

These muscles help the iliopsoas muscle with lifting the thigh, but their effect also extends across the knee. Tears or strains may occur within the hip flexor muscles; where the muscles and tendons join musculotendinous junction ; or within the tendons. Traumatic injury resulting in rapid onset of pain is usually associated with sporting actions such as:.

Changes in tendon health often evolve more slowly, related to your bodys natural make-up e. The iliopsoas tendon that joins the iliopsoas muscle to the femur thigh bone sits deep at the front of the hip and is separated from the hip joint by a large bursa iliopectineal or iliopsoas bursa. This bursa reduces friction and helps the tendon slide freely across the front of the hip.

The hip flexors muscles, and particularly the iliopsoas muscle, have become incorrectly demonised in the popular media for being the source of many problems.

These are generally thought to be related to the muscles becoming overly active and tight. There is unfortunately much misinformation on the internet regarding the hip flexors and poor advice regarding management of true hip flexor issues. Many people are stretching the hip flexors and placing high loads on the front of the hip unnecessarily, often worsening their problem. The adductor muscles of the groin sit on the inner side of the thigh, between the pelvis and the knee Figure 2.

This group of muscles includes:. These muscles can be involved in other roles but primarily work to pull the legs inwards, towards each other adduction. They also help control the energy of the moving leg or the moving body during kicking actions and changing direction when running. The adductor longus and often the brevis too, have extensive connections through the groin Figure 2.

The abdominal muscles extend from the ribcage down to the pelvis, supporting the spine and allow the trunk to curl upforwards or to the side. They also help control the position of the pelvis. There are also another 3 layers of abdominal muscles external oblique superficially, internal oblique beneath and Figure 2. Area of inguinal related groin pain is indicated by the dashed box.

At the front, they join into a big ligament that runs across the groin — the inguinal ligament Figure 2. Traumatic injury resulting in a rapid onset of pain, is usually associated with sporting actions such as:.

A single cause for more longstanding groin pain can however be much more difficult to establish. One of the main reasons for this is the large amount of interconnection between the soft tissues around the pubic region. Magnetic Resonance Imaging MRI scans of someone who has had groin pain for more than 3 months will often reveal a variety or combination of findings, and you may receive a diagnosis of:.

In the region where the abdominal muscles join onto the pelvis and the inguinal ligament Figure 2. A hernia is where the pressure of the bowel against the weakened area can cause the appearance of a bump, as the bowel pushes into the area. More severe hernias are easily visible, but most of the time inguinal hernias are small and only picked up on ultrasound scans. The muscles that sit around the side of the hip are called the hip abductor muscles Figures 2.

Their main functions are to move your leg out away from the midline of your body abduction and to anchor your pelvis to your femur when standing on one leg. This allows you to keep your pelvis fairly level and maintain your balance. With all these muscles and their tendons moving over each other and the underlying bones, a number of small flat, fluid-filled cushions bursae are present, to help everything slide freely Figure 2. The main bursae are the trochanteric bursa, the subgluteus medius bursa and the subgluteus minimus bursa.

Acute muscle tears or strains occur most frequently in the gluteus maximus and medius muscles and occasionally in the tensor fascia lata muscle.

This is more likely to occur during rapid sidestepping or change of direction when running. Tears in these muscles are however relatively rare compared to thigh and groin strains. Pain over the side of the hip that develops more gradually is most commonly related to the health of the soft tissues at the anchor-point for the gluteus medius and minus on the femur the greater trochanter Figure 2.

You may receive a diagnosis of:. You might like to read further about terms used for lateral hip pain in our blog. Pain in this area is often attributed to tightness of the ITB and therefore you may read much advice to stretch the ITB as a self-help strategy. In fact, expert Hip Pain Professionals agree that people with gluteal tendon or bursal problems are much more likely to be longer than average, rather than short in the ITB.

Stretching may actually provoke the pain, rather than settle it Figure 2. Read more here on the high-quality scientific evidence that is now available on successful management of this condition with NO ITB stretching!

Seek the assistance of a Hip Pain Professional to:. A Hip Pain Professional can:. In the upper buttock region, many muscles and their surrounding thin fibrous wrapping fascia converge, joining firmly onto the pelvis and sacrum.

These back, abdominal and buttock muscles play a vital role in generating and transferring forces that pass across the pelvis, between the back and hips. The muscles are also covered in strong fascia that continues from the hips gluteal fascia into the back thoracodorsal fascia. This strong, stretchy wrapping helps store and transfer energy through this region Figure 2. The upper part of the gluteus maximus muscle, and the gluteus medius muscle beneath, run from their anchor points on the pelvis and sacrum, around to the side of the hip lateral hip region.

The piriformis muscle also sits under the gluteus maximus in the upper buttock, having strong connections into the bones and ligaments of the sacroiliac joint SIJ at the back of the pelvis Figure 2. Soft Tissue-Related Pain in the Upper Buttock Pain in the upper buttock can be associated with any of the local soft tissues — the muscles, their attachments onto the bone and the fibrous wrapping fascia that surrounds them.

The muscles of the lower buttock region are involved in providing support for the back of the hip joint and moving the hip into extension and external rotation — taking your leg backwards and turning your knee outwards. If you put your hands on the lower half of your bottom you will be touching the lower portion of the gluteus maximus muscle, an important muscle for pushing up from a squat or lunge position or for extending the leg behind especially when walking up a hill or stairs Figure 2.

The hamstring muscles semimembranosis, semitendinosis and biceps femoris muscles in the back of the thigh help to extend the hip take the thigh backwards , but also bend the knee. This combined function makes the hamstring muscles very important muscles for transferring forces between the hip and lower leg in actions such as running, kicking, lifting and lunging Figure 2. Beneath the lower part of the gluteus maximus muscle, sit a group of small muscles, referred to as the deep hip rotators Figure 2.

They work to rotate the thigh and turn the knee outwards. They also have important connections into:. The hamstring muscles in the back of the thigh also attach deep in the buttock, onto the sitting bones ischial tuberosities. Directly on top of the hamstring attachment is a small flat, fluid-filled cushion the ischial or ischiogluteal bursa Figure 2. This helps reduce friction and allows smooth gliding of the largest buttock muscle gluteus maximus over the hamstring tendons.

Your Hip Pain Professional can:. The saddle region is the area between the hips that would contact a saddle when riding a horse or bicycle. There are a number of muscles and large ligaments that run through this region.

The pelvic floor is the name given to a group of muscles that form a wide sling between the pubic bones at the front of the pelvis and the lower sacrum and coccyx tailbone at the back Figure 2. The pelvic floor muscles have strong connections with one of the deep hip rotator muscles obturator internus. This muscle starts from the inner surface of the pelvis in the saddle region, then runs out through the back of the pelvis and across the back of the hip, through the lower buttock region Figure 2.

You can read more about the deep rotators in the section on Soft Tissues of the Lower Buttock. There are some large ligaments Figure 2. The sacrotuberous ligament runs from the sacrum to the inner edge of the ischial tuberosity sitting bone where it has connections into the hamstring tendons. The sacrospinous ligament runs from the sacrum, underneath the sacrotuberous ligament and across to an area above the sitting bone, called the ischial spine. The sacrospinous ligament has strong attachments to the coccygeus muscle of the pelvic floor.

These ligaments play an important role in providing stability for the sacroiliac joints and assisting the pelvic floor in supporting the internal organs. Pain in the saddle region may be due to problems with the pelvic floor muscles, often referred to as pelvic floor dysfunction. The muscles may be too weak or too active. If they are too active, known as a hypertonic pelvic floor then strengthening exercises may not be the best approach. Pelvic floor dysfunction may result in:.

Vaginismus is a diagnosis where the hypertonic pelvic floor pelvic floor muscles that are too active or muscle spasm affects the muscles around the vagina, making any penetration painful or impossible, for example, inserting tampons or sexual intercourse. This is a complex condition and can have many causes. Some medical causes need to be ruled out. Psychological issues can also be relevant and must be addressed.

However, in cases linked in particular to trauma often from childbirth or micro damage occurring around menopause, musculoskeletal therapy can be beneficial. Coccydynia is a diagnosis meaning a painful tailbone. You can also read more about pain relating to the coccyx and sacrococcygeal joint, known as coccydynia, under the joint section of Hip Pain Explained.

Pain may also be associated with abnormal strain placed on the large ligaments Figure 2. This is usually secondary to problems with the sacroiliac joint, hamstrings, or pelvic floor muscles. Although relatively more rare than soft tissue or joint problems, bony problems such as a fracture, stress fracture or very rarely, infection or tumour within the bone may cause hip and pelvic pain.

In growing children or adolescents, pain may be related to disorders of the growth plates of the femurs or pelvis. The pelvis is a ring of bone, made up of two halves, joining together at the front in the pubic symphysis. At the back of the pelvis, these halves join to either side of the sacrum which is the lowest part of the spine.

These joins form the two sacroiliac joints SIJs. Beneath your sacrum is your coccyx, joining at the sacrococcygeal joint. These are the bones that make up the pelvis Figures 3. More information about these joints can be found under the Joint tab listed above. The long bone within the thigh is called the femur. It has a ball on the top called the head of the femur. This fits into a socket on the pelvis called the acetabulum.

This is the hip joint Figure 3. The most common fractures around the hip and pelvis include a fracture of the neck of the femur common in older women with osteoporosis , or fractures through the pelvis related to large traumas or where stress fractures have not been attended to early enough. Sometimes the coccyx tailbone may be fractured during childbirth or a heavy fall onto the bottom or back may result in a fracture of the coccyx or sacrum. The pain of apophysitis is related to an inflammation of the bony growth centres where these muscles attach.

Pain is generally experienced locally at the area of muscle attachment but can radiate around the area as well. Pain related to the bones could be felt anywhere around the hip or pelvis region depending on the bone affected and the cause of the bone pain. Our Pain Locator Map highlights the bones that may be responsible for pain in each region.

Pain in these areas may have other causes, so visit our Pain Locator Map to read further. Pain experienced around the hip and pelvis sometimes has nothing to do with problems in this area. There are two main ways this might occur:. Referred pain is pain felt in a part of the body other than its actual source. However, this area of the spinal cord also receives information from structures in the hip and pelvis.

The brain is unable to distinguish where the information came from, the back, the hip or the pelvis so you might feel pain in any one or a combination of these areas Figure 4. Radicular pain is pain associated with irritation of the nerve roots as they exit the spine. Most commonly this is associated with inflammation or compression from the nearby disc. The nerve roots that exit at each level of the spine give rise to sensation indifferent areas of the skin, called dermatomes Figure 4.

When a nerve root is irritated at the spine, pain may be felt in the area of skin that the nerve root supplies. For example, compression of the nerve roots that exit between the 4th and 5th lumbar vertebrae L or the 5th lumbar vertebra and the sacrum L5-S1 ,could, for some people, result in painful sensations across the buttock, down the back of the thigh and right down into the foot see picture.

This term is not correct. These types of fractures are usually the result of a direct blow to this part of the hip due to a fall. Displaced Fracture. Nondisplaced Fracture. Stress or Insufficiency Fracture. The fracture is limited to a tiny crack or cracks in the bone.

X-rays and other diagnostic tests can confirm which type of fracture you may have. Symptoms of a hip fracture vary depending on the severity of the injury and the location of the break. Most people experience significant sharp pain in the hip or groin and may not be able to put any weight on the affected hip. They may also notice swelling, redness, or bruising in the skin above the injury. A pelvic fracture occurs when there is an injury to any of the large butterfly-shaped group of bones—the ilium, ischium, and pubis—located at the base of the spine.

Ligaments attach this ring of bones to the sacrum at the lower part of the spine. On each side of the pelvis, the cup-shaped socket called the acetabulum connects with the femoral head to form the hip joint. Ilium Fracture. The two largest pelvic bones are round, flat bones called ilia. This fracture often results from falls or other accidents.

Ischium and Pubis Fractures. Below each ilium is a ring-shaped structure composed of the ischium and pubis bones. These fractures often result from falls or other accidents.

Acetabulum Fracture. The acetabulum is the socket located on each side of the pelvis. This fracture usually occurs as the result of a car accident or fall from a significant height with damage to other bones and soft structures in and around the hip and pelvis. Pelvic Stress Fracture. This type of fracture usually develops as a result of repetitive, high impact activity that puts stress on the pelvis, such as long-distance running or ballet.

This type of fracture is also common for people with osteoporosis. Hip and pelvic fractures commonly occur in people older than age 60 as a result of falls. Postmenopausal women who have osteoporosis, a condition that weakens the bones, are most vulnerable.

In athletes, repeated high-impact activity may cause a stress fracture, which is a tiny crack in the hip or pelvic bone. Your doctor will also conduct a physical exam of the affected hip or pelvic bone to assess the extent of swelling, bruising, and tenderness, and will confirm a diagnosis of whether or not you have a fracture with imaging tests. Imaging tests, such as an X-ray, will help determine the location of a fracture, how many bones are affected, and whether an injury has damaged surrounding soft tissues, such as tendons, ligaments, blood vessels, or nerves.

CT scans may also be ordered to examine a fracture pattern or assess the extent of damage in the hip joint. It may also reveal the presence of small bone fragments that would need to be removed surgically. Sometimes an MRI or bone scan may be ordered to look for small hairline fractures. These are usually recommended when hip or pelvic fractures are nondisplaced, meaning the bone fragments remain in place. In that regard, your doctor may recommend any one of the following:.

Activity Modification. To help you get around during this time period, you may use crutches, a walker, a cane, or a wheelchair. The ball like head of the femur fits into the acetabulum; the cup shaped part of the pelvis are formed together to make this joint.

There is a ligament that connects the femur to acetabulum across the gap between the two bony surfaces, and it stabilizes the joint when the bones move. Hip joints are responsible for transferring the upper body weight from the pelvis to the legs. In addition, they have a remarkable range of motion, due to the presence of four sets of muscles and tendons attached to it.

It also maintains the body stability during weight- bearing activities. Coming from Engineering cum Human Resource Development background, has over 10 years experience in content developmet and management. Your email address will not be published. Author: BruceBlaus, Source: Own work.



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