Anatomy and Cell Biology 2221 Lecture Notes - Lecture 6: Infraspinatus Muscle, Supinator Muscle, Supraspinatus Muscle
28 Sep 2016
School
Department
Professor
Document Summary
Brachial plexus: name and identify the brachial plexus and all its branches, name and identify the muscles served by each branch, consider the possible functional consequence(s) if branches of the brachial plexus were to be damaged. Braid of nerves going to your arm. Collection of axons held together in a pattern by connective tissue. Starts in neck (nerve roots); plexus travels through and ends in lower axilla; becomes terminal. Supplies motor and sensory fibers from spinal cord to upper limb to give you movement/sensation. Derived from ventral rami of c5, c6, c7, c8, t1. Cervical region- ventral rami come out above vertebrae of same number. Trunks split into 6 divisions: lies onto the clavicle. Can be found in the axilla- named according to where that lie relative to axillary artery* See what terminal braches are derived from what roots. Each trunk throws off an anterior and posterior division (3x2) = 6 divisions. Impairment(s) in movement (paralysis; complete/incomplete) and/or sensation (anesthesia)
