medial cord medial cord the medial cord is the part of the brachial plexus formed by of the anterior division of the lower trunk (c8-t1). its name comes from it being medial to the axillary artery as it passes through the axilla. the other cords of the brachial plexus are the posterior cord and lateral cord. medial corddiagram of the brachial plexus. (medial cord is at bottom left.)the right brachial plexus with its short branches, viewed from in front. the sternomastoid and trapezius muscles have been completely, the omohyoid and subclavius have been partially, removed; a piece has been sawed out of the clavicle; the pectoralis muscles have been incised and reflected.detailsfrombrachial plexus - lower trunktomedian pectoralmedial brachial cutaneousmedial antebrachial cutaneousmedianulnaridentifierslatinfasciculus medialis plexus brachialista98a14.2.03.022ta26417fma45236anatomical terms of neuroanatomy the medial cord gives rise to the following nerves from proximal to distal: medial pectoral nerve (c8-t1) medial brachial cutaneous nerve (t1) medial antebrachial cutaneous nerve (c8-t1) medial head of median nerve (c8-t1) ulnar nerve (c8-t1, occasionally c7) additional images brachial plexus