Anterior view of median and musculocutaneous nerve innervation.

Observe that three nerves (musculocutaneous, median, and ulnar) are arranged like limbs of an upper case M. Also observe anterior divisions (AD) and posterior divisions (PD).

Anterior view of the bones of the upper limb showing muscle attachments.

Posterior view of upper thorax and neck region showing the splenius capitis muscle and its bony attachments shown on the right side of the vertebrae.

Posterior view of upper thorax and neck region showing the splenius cervicis muscle and its bony attachments on the left side of the thoracic and cervical vertebrae.

Arterial anomalies of posterior leg, posterior view. B. High division of popliteal artery. Along with the anterior tibial artery descending anterior to the popliteus muscle, this anomaly was found to occur in approximately 2% of limbs.

Upper limb muscles, posterior