Question: Which two nerves supply the muscles of the upper arm?

What are the two main nerves in the arm?

Nerves of the Arm

  • Median nerve. This nerve passes down the inside of the arm and crosses the front of the elbow. …
  • Ulnar nerve. This nerve passes down the inside of the arm. …
  • Radial nerve. This nerve passes down the back and outside of the upper arm.

What nerve supplies the bicep?

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 muscles are in upper arm?

Upper arm muscles

  • Biceps brachii. Often referred to as your biceps, this muscle contains two heads that start at the front and back of your shoulder before joining together at your elbow. …
  • Brachialis. This muscle lies underneath your biceps. …
  • Coracobrachialis. This muscle is located near your shoulder.

What are the nerves of the upper limb?

Nerves

  • Supraclavicular Nerve. …
  • Axillary Nerve. …
  • Musculocutaneous Nerve. …
  • Radial Nerve. …
  • Median Nerve. …
  • Ulnar Nerve. …
  • Medial Brachial Cutaneous Nerve. …
  • Medial Antebrachial Cutaneous Nerve.
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What nerves innervate the arm muscles?

The musculocutaneous nerve is responsible for innervating the flexors of the arm, including the biceps brachii, coracobrachialis, and the medial aspect of the brachialis. The radial nerve innervates the triceps brachii, lateral aspect of the brachialis, anconeus, brachioradialis, and extensor carpi radialis longus.

What nerve Innervates the top of the shoulder?

The suprascapular nerve (C5) comes off the upper trunk and supplies the supraspinatus (abduction) and infraspinatus (external rotation) of the shoulder.

What two muscles in the anterior flexor compartment of the arm cross the shoulder joint?

The two-headed biceps brachii crosses the shoulder and elbow joints to flex the forearm, also taking part in supinating the forearm at the radioulnar joints and flexing the arm at the shoulder joint. Deep to the biceps brachii, the brachialis provides additional power in flexing the forearm.

Where are the main nerves in your arm?

The three main nerves in your arm and their approximate paths are: the median nerve, which runs down the center of your arm. the radial nerve, runs down the thumb side of your arm. the ulnar nerve, which runs down the little finger side of your arm.