Table of Contents
What muscles are innervated by the musculocutaneous nerve?
The musculocutaneous nerve innervates the three muscles of the anterior compartment of the arm: the coracobrachialis, biceps brachii, and brachialis. It is also responsible for cutaneous innervation of the lateral forearm.
What nerve Innervates wrist flexors?
The median nerve is a major nerve of the upper limb as it innervates the major muscles that enable an individual to flex their wrist and fingers, and oppose their thumb.
What muscles are innervated by the axillary nerve?
The axillary nerve has both a motor and a sensory distribution of innervation. It has motor fibres that innervate the deltoid muscle, acting as an abductor, flexor and extensor at the shoulder joint, as well as the teres minor muscle, allowing lateral rotation of the glenohumeral joint.
What Innervates the musculocutaneous nerve in the shoulder?
It is innervated by the radial nerve, so is not affected by musculocutaneous nerve injury. Supination and flexion at the shoulder joint is also weakened but not lost due to role of supinator and pectoralis major respectively. Sensation to the lateral part of the forearm would also be affected.
What nerve Innervates wrist extensors?
Radial Nerve
Radial Nerve: Triceps brachii (medial and lateral heads) — provides the extension of the forearm. Extensor carpi radialis longus — provides for the extension of the wrist.
How many muscles are innervated by the ulnar nerve?
The deep branch of the ulnar nerve innervates the three hypothenar muscles, the two medial lumbricals, the seven interrosei, the adductor pollicis and the deep head of the flexor pollicis brevis. It supplies all intrinsic hand muscles which lie medial to the flexor pollicis except the last lateral two lumbricals.
What nerve innervates the flexor carpi radialis?
the median nerve
The flexor carpi radialis (FCR) muscle receives innervation from the median nerve. In most limbs there is only one branch to the FCR. It arises from the lateral epicondyle of the humerus and adjacent areas.
What nerve Innervates subscapularis?
The subscapularis muscle is typically innervated by two distinct nerves, namely an upper and a lower subscapular nerve, both originating from the brachial plexus [4]. These two nerve branches cross the axillary vein dorsally to reach the subscapularis muscle [5].
Is suprascapular nerve sensory innervation?
The suprascapular nerve has a motor and sensory innervation. Its motor innervation is to the supraspinatus and infraspinatus muscles.
What is innervated by the sciatic nerve?
The undivided sciatic nerve innervates the 4 hamstring muscles and the short head of the biceps femoris muscle along the back of the thigh. The nerve also partially supplies the adductor magnus muscle along the inner front side of the thigh.
What fingers do the ulnar nerve innervate?
In summary, the ulnar nerve innervates the palmar aspects of the medial one and a half fingers and the dorsal aspects of the medial two and a half fingers.