Dr. Kevin Yip

Dr Kevin Yip
Orthopaedic Surgeon
MBBS(UK), FRCS(EDIN), FAM(SING), FHKCOS(ORTHO)

Featured on Channel NewsAsia

ISOMETRIC CONTRACTIONS

Resisted flexion

Positioning.

The subject lies in the supine position with the hip flexed to a right angle. The
examiner stands level with the thigh and places one knee against the ischial tuberosity. Both hands are clasped at the anterior and distal end of the thigh.

Procedure.

Resist the subject’s attempt to flex the hip.

Common mistakes
.

A sudden start or sudden stop may induce unintentional movement.

Anatomical structures tested:

Muscle function:

• III/portallt flexors:
– Iliopsoas
– Rectus femoris
– Sartorius
– Tensor fasciae latae
• Accessory flexors:
– Pectineus
– Adductor longus, brevis and magnus.

Common pathological situations:

• A painless weakness is always a warning sign for serious disorders: second root palsy, nervus femoralis palsy or abdominal neoplasma, It may, however, also be present in psychoneurosis.
• Pain alone may indicate a tendinitis of psoas, sartorius or rectus femoris.
• Pain and weakness are found in avulsion fractures of the lesser trochanter and anterior superior spine.

Comments are closed.