What movements are associated with the S1 myotome?

The S1 myotome is primarily associated with movements that involve the muscles innervated by the sacral nerve roots, particularly related to the lower leg and pelvic region. The correct answer includes plantarflexion, eversion, and hip extension, which are indeed key functions associated with the S1 myotome.

Plantarflexion involves the action of pushing the foot down away from the leg, primarily performed by the gastrocnemius and soleus muscles. Eversion refers to the movement of the foot turning outward, which is facilitated by the peroneus longus and brevis muscles. Hip extension, the movement of extending the hip joint, is largely facilitated by the gluteus maximus muscle.

Understanding these associations with the S1 myotome aids in assessing neurological function and diagnosing conditions related to nerve injuries or spinal issues.