Neuro - Brachial and Sacral Plexuses

Name the nerves branching from each of the following plexuses: cervical, brachial, lumbar, sacral. AS A REMINDER: Cervical Plexus (C1-C4) Provides sensorimotor innervation to parts of the head, neck, chest and diaphragm. The plexus has two types of branches: 4 cutaneous, 5 muscular. Brachial Plexus (C5-T1) Five spinal roots (anterior primary rami of spinal nerves) form three trunks which each split into two divisions (six total) which regroup as three cords. Cords are named by location with respect to the axillary artery. Branches from the brachial plexus form common peripheral nerves. 5 roots: C5-T1 3 trunks: superior/upper (C5, C6), middle (C7), inferior/lower (C8, T1) 6 divisions: anterior and posterior divisions of each superior, middle, and inferior trunks 3 cords: posterior (posterior divisions of the trunks, C5-T1), lateral (anterior divisions of upper and middle trunks, C5-C7), medial (continuation of anterior division of lower trunk, C8-T1) Lumbar Plexus (T12-L4) Sensorimotor innervation to the anterior thigh. Formed by two divisions (anterior, posterior) of the first four lumbar nerves (L1-L4) and the last thoracic nerve (T12). Sacral Plexus L4-S4) Sensorimotor innervation to the posterior thigh, (most) lower leg and foot, (part) pelvis.