GENERAL HISTOLOGY

Detailed explanation-1: -The brachial plexus is a major network of nerves transmitting signals responsible for motor and sensory innervation of the upper extremities, including the shoulder, arm, and hand. It originates from the ventral rami of C5 through T1 spinal nerves.

Detailed explanation-2: -The brachial plexus provides somatic motor and sensory innervation to the upper extremity, including the scapular region. As the brachial plexus travels through the posterior triangle of the neck into the axilla, arm, forearm, and hand, it contains various named regions based on how the plexus is formed.

Detailed explanation-3: -The brachial plexus is a network of nerves (nerve plexus) formed by the anterior rami of the lower four cervical nerves and first thoracic nerve (C5, C6, C7, C8, and T1).

Detailed explanation-4: -Subclavian nerve This nerve emerges from the superior trunk of the brachial plexus and contains fibers of C5 and C6 spinal nerves. The subclavian nerve provides motor innervation to the subclavius muscle.