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  2. Axillary nerve - Wikipedia

    en.wikipedia.org/wiki/Axillary_nerve

    The nerve lies at first behind the axillary artery, [4] and in front of the subscapularis, [1] and passes downward to the lower border of that muscle.. It then winds from anterior to posterior around the neck of the humerus, in company with the posterior humeral circumflex artery, [2] through the quadrangular space (bounded above by the teres minor, below by the teres major, medially by the ...

  3. Deltoid muscle - Wikipedia

    en.wikipedia.org/wiki/Deltoid_muscle

    These neuromuscular segments are supplied by smaller branches of the axillary nerve, and work in coordination with other muscles of the shoulder girdle include pectoralis major and supraspinatus. [9] The axillary nerve is sometimes damaged during surgical procedures of the axilla, such as for breast cancer. It may also be injured by anterior ...

  4. Brachial plexus - Wikipedia

    en.wikipedia.org/wiki/Brachial_plexus

    The brachial plexus is a network of nerves (nerve plexus) formed by the anterior rami of the lower four cervical nerves and first thoracic nerve (C5, C6, C7, C8, and T1).This plexus extends from the spinal cord, through the cervicoaxillary canal in the neck, over the first rib, and into the armpit, it supplies afferent and efferent nerve fibers to the chest, shoulder, arm, forearm, and hand.

  5. Teres minor muscle - Wikipedia

    en.wikipedia.org/wiki/Teres_minor_muscle

    The muscle is innervated by the posterior branch of axillary nerve where it forms a pseudoganglion. [3] A pseudoganglion has no nerve cells but nerve fibres are present. Damage to the fibers innervating the teres minor is clinically significant.

  6. Posterior cord - Wikipedia

    en.wikipedia.org/wiki/Posterior_cord

    thoracodorsal nerve: C6-C8: latissimus dorsi muscle axillary nerve: C5-C6: sensation to the shoulder and motor to the deltoid muscle and the teres minor: radial nerve: C5-C8, T1: triceps brachii muscle, the brachioradialis muscle, the extensor muscles of the fingers and wrist (extensor carpi radialis muscle), supinator, and the extensor and ...

  7. Arm - Wikipedia

    en.wikipedia.org/wiki/Muscles_of_the_Arm

    This nerve continues in the arm, travelling in a plane between the biceps and triceps muscles. At the cubital fossa, this nerve is deep to the pronator teres muscle and is the most medial structure in the fossa. The nerve passes into the forearm. The ulnar nerve, origin C8-T1, is a continuation of the medial cord of the brachial plexus.

  8. Lateral cord - Wikipedia

    en.wikipedia.org/wiki/Lateral_cord

    Its name comes from it being lateral to the axillary artery as it passes through the axilla. The other cords of the brachial plexus are the posterior cord and medial cord. The lateral cord gives rise to the following nerves from proximal to distal: lateral pectoral nerve (C5-C7) musculocutaneous nerve (C5-C7)

  9. Musculocutaneous nerve - Wikipedia

    en.wikipedia.org/wiki/Musculocutaneous_nerve

    The musculocutaneous nerve is a mixed branch of the lateral cord of the brachial plexus derived from cervical spinal nerves C5-C7. It arises opposite the lower border of the pectoralis minor. [1] It provides motor innervation to the muscles of the anterior compartment of the arm: the coracobrachialis, biceps brachii, and brachialis. [2]