Physiotherapists in Poole treat many different conditions including the issues profiled below.

The Sacro-Iliac Joint

The sacro-iliac joints are a pair of large irregular joints at the base of the spine which connect the sacrum, the triangular bone below the lumbar vertebrae, with the ilium, the large wings of the pelvis. It is a synovial joint like the fingers or knees but has very limited movement and functions to transfer the weight of the upper body from the spine to the hips. The sacro-iliac joint has very strong ligaments which travel the very short distances between the two highly irregular joint surfaces. There are no muscles which can act to produce real movements of the joint as other joints move and it functions as the weight transmitting and stress relieving pelvic joint.

The sacro-iliac joints are designed to absorb the torsional stresses which occur in the pelvis during gait and do have small degree of movement to help them manage this function. The irregular joint surfaces with its depressions and prominences allow the sacrum to lock between the iliac bones so that it cannot be driven downwards by the weight of the body. The irregular joint surfaces also prevent the sacrum being rotated inappropriately, with its strong ligaments being responsible for absorbing pelvis stresses during walking.

Muscle

Human muscle is classified into three types, smooth, striated and cardiac. Striated or skeletal muscle is the type we think about when we consider muscle, allowing us to contract with force, maintain posture and produce movement. Muscle is well supplied with blood and also with nerve endings which are able to continuously monitor the stresses and strains through the tissue. Pain nerve endings are present mainly in the fibrous sheaths which surround the muscle. The muscle is structured in bundles of fibres, each surrounded by a fibrous sheath which join together at the ends into tendinous tissue on its way to attachment to bone.

Muscle fibres can be orientated in various directions which gives the muscles different abilities as contractile structures. If the fibres are arranged longitudinally along the muscle it tends to be longer and to be able to contract more in length terms, while muscles in different configurations such as the fibres on a feather can generate higher degrees of force. Higher forces may be required in muscles which have to work against gravity and move the weight of the body. Muscles have three different types of fibres, named Type 1, 2A and 2B, with different functions.