Brachial plexus thru axillary nerve
The deltoid muscle is primarily innervated by the axillary nerve, which originates from the brachial plexus.
what major nerves arise from the coccygeal plexus
It is the middle deltoidIt is the Deltoid Muscle .
Cervical: C1 - C5Innervates muscles of neck and extend into thoracic cavity, where they control diaphragmatic muscles. Major nerve: Phrenic...which provides entire nerve supply to diaphragm.Brachial: C5-T1Innervates pectoral girdle and upper limbs. Major nerves: Radial nerve, median nerve, ulnar nerve.Lumbar: T12 - L4Innervates pelvic girdle and lower limbs. Major nerves: Genitofemoral nerve, lateral femoral cutaneous nerve, and femoral nerve.Sacral: L4-S5Innervates pelvic girdle and lower limbs. Major nerves: Sciatic nerve (which branches into tibial and fibular nerves) and pudendal nerve.
what major nerves arise from the coccygeal plexus
Deltoid
Spinal chords
The pectoralis major muscle ends where the deltoid muscle begins at the clavicle and scapula. These muscles are important for shoulder movement and stability.
A plexus (from the Latin plectere,meaning "braid") is an interwoven network of spinal nerves. There are four major plexuses on each side of the body: 1) the cervical plexus innervates the muscles of the neck, the skin of the neck, the back of the head, and the diaphragm muscle; 2) the brachialplexus innervates the shoulder and upper limb; 3) the lumbar plexus innervates the muscles and skin of the abdominal wall; and 4) the sacral plexus innervates the buttocks and lower limbs. The nerves then divide into smaller branches.
The major plexuses of the spinal cord are the cervical plexus (C1-C5), brachial plexus (C5-T1), lumbar plexus (L1-L4), and sacral plexus (L4-S4). These plexuses are networks of nerves that supply motor and sensory function to various regions of the body.
The synergist to the pectoralis major muscle is the deltoid muscle. The deltoid helps to assist in shoulder flexion and abduction, which complements the actions of the pectoralis major in movements like pushing or pressing exercises.
The brachial plexus is a network of nerves fibers that connects the arm to the spinal cord. Injury of it could cause the arm to be paralyzed, a lack of muscle control, and/or a lack of sensation.