What is innervated by C7?
C7 mainly forms the radial nerve to innervate triceps muscle; d. C8 mainly forms the median nerve to innervate the flexor digitorum muscle; e. T1 mainly forms the ulnar nerve to innervate the intrinsic muscles of the hand.
What muscle is innervated by C8?
The abductor and flexor pollicis brevis, opponens pollicis, and lateral two lumbricals are innervated by C8–T1 via the median nerve, entering the hand through the carpal tunnel.
What is the median nerve?
The median nerve provides sensory and motor (movement) functions to your forearm, wrist and hands. The nerve starts at your armpit, but its functions all take place in your forearm or hand.
Which muscles are supplied by C7 nerve root?
From the lateral cord, C5, C6, and C7 supply the pectoralis major and minor muscles, via the lateral and medial pectoral nerves, as well as the coracobrachialis, brachialis and biceps brachii, via the musculocutaneous nerve.
What does C7 nerve control?
Cervical nerve 7 controls your triceps and wrist extensor muscles. C7 provides sensation to the back of your arm into your middle finger.
What is innervated by T2?
T1 and T2 (top two thoracic nerves) feed into nerves that go into the top of the chest as well as into the arm and hand. T3, T4, and T5 feed into the chest wall and aid in breathing. T6, T7, and T8 can feed into the chest and/or down into the abdomen.
Which muscles are innervated by the median nerve?
The median nerve predominantly provides motor innervation to the flexor muscles of the forearm and hand as well as those muscles responsible for flexion, abduction, opposition, and extension of the thumb.
What muscles are innervated by cervical nerves?
Outside of the cervical plexus, the several muscles are innervated directly by upper cervical nerve roots:
- C1 to C2: Rectus capitis anterior/lateralis.
- C1 to C3/4/5: Longus capitis.
- C2/3 to C4: Trapezius (sensory)
What is the C7 nerve root?
The C6-C7 Nerve Root This nerve root controls both muscle and skin in the arm via its sensory and motor roots. Some basic actions like stretching the fingers, contracting the triceps, and moving the elbow and wrists are controlled by the C7 motor roots.