Specifically, the C4 nerve enervates the levator scapulae, trapezius and rhomboid muscles. Damage to the C4 nerve may result in difficulty in elevating the shoulders. The C5 nerve supplies the deltoid, supraspinatus, infraspinatus and biceps muscles.

Cervical spinal nerve 4, also called C4, is a spinal nerve of the cervical segment. It originates from the spinal cord above the 4th cervical vertebra (C4). It contributes nerve fibers to the phrenic nerve, the motor nerve to the thoracoabdominal diaphragm.

Muscles Innervation; C3 C4 C5 C6 C7 C8 T1; Scapula: Elevation Upper Trapezius: O X Levator Scapula: O O O Depression Lower Trapezius: O X Retraction Middle Trapezius: O X Rhomboids: O O ... O - Accessory Nerves Innervating Muscle References [edit | edit source] ↑ 1.0 1.1 Harvey L. Management of Spinal Cord Injuries: A Guide for ...

Dec 9, 2020 · Level of injury refers to the bottommost segment of the spinal cord where normal motor and sensory functions exist. The C4 nerve roots affect sensation at the shoulders, upper back, and upper chest. They also affect control over …

Jan 18, 2022 · C4 provides sensation for parts of your neck, shoulders and upper arms. Cervical nerve 5 controls the deltoid muscles of your shoulders and your biceps. C5 provides sensation to the upper part of your upper arm down to your elbow.

Jun 7, 2024 · C3 helps support the weight of the head and facilitates flexion and extension movements, while C4 provides stability and helps in maintaining proper alignment. When any of these cervical vertebrae – C2, C3, or C4 – are affected, they can contribute to neck pain and various associated symptoms.

Branches of the C3, C4, and C5 spinal nerves form the phrenic nerve that innervates the diaphragm, enabling breathing. Within the spinal canal of each of these motion segments, the spinal cord is protected by the vertebral bodies in front and vertebral arches at the back.

Oct 30, 2023 · They consist of 3 main groups of muscles: anterior, lateral and posterior groups, based on their position in the neck. The musculature of the neck is further divided into more specific groups based on a number of determinants; …

Oct 12, 2023 · The plexus is formed by the anterior rami (divisions) of cervical spinal nerves C1-C4. In this article, we shall look at the anatomy of the cervical plexus – its branches, functions and clinical correlations.

These complex networks of nerves enable the brain to receive sensory inputs from the skin and to send motor controls for muscle movements. In the cervical spine, there are eight pairs of spinal nerves labeled C1 to C8, which innervate the neck, shoulder, arm, hand, and more.