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Encyclopedia > Long thoracic nerve
Nerve: Long thoracic nerve
Nerves of the left upper extremity. (Long thoracic labeled vertically at shoulder, to left of artery.)
The right brachial plexus with its short branches, viewed from in front. (Long thoracic labeled at center, third from top.)
Latin nervus thoracicus longus
Gray's subject #210 933
Innervates serratus anterior muscle
From brachial plexus (C5-C7)
Dorlands/Elsevier n_05/12566912

The long thoracic nerve (external respiratory nerve of Bell; posterior thoracic nerve) supplies the Serratus anterior. Image File history File links Download high resolution version (524x1000, 162 KB) File links The following pages link to this file: Ulnar nerve Long thoracic nerve Wikipedia:Grays Anatomy images with missing articles 17 Musculocutaneous nerve List of images in Grays Anatomy: IX. Neurology ... Image File history File links Gray808. ... The brachial plexus is an arrangement of nerve fibres (a plexus) running from the spine (vertebrae C5-T1), through the neck, the axilla (armpit region), and into the arm. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... Serratus anterior Serratus anterior muscle is the surface of upper 9 ribs at side of chest - anterior aspect along entire length of medial border of scapula - (protraction) draws medial border of scapula away from vertebrae (upward rotation). ... The brachial plexus is an arrangement of nerve fibres (a plexus) running from the spine (vertebrae C5-T1), through the neck, the axilla (armpit region), and into the arm. ... Elseviers logo. ... Serratus anterior Serratus anterior muscle is the surface of upper 9 ribs at side of chest - anterior aspect along entire length of medial border of scapula - (protraction) draws medial border of scapula away from vertebrae (upward rotation). ...


It usually arises by three roots from the fifth, sixth, and seventh cervical nerves (C5-C7) but the root from C7 may be absent. The roots from C5 and C6 pierce the Scalenus medius, while the C7 root passes in front of the muscle. The Cervical Nerves—The posterior division of the first cervical or suboccipital nerve is larger than the anterior division, and emerges above the posterior arch of the atlas and beneath the vertebral artery. ... The Scalenus medius, the largest and longest of the three Scaleni, arises from the posterior tubercles of the transverse processes of the lower six cervical vertebræ, and descending along the side of the vertebral column, is inserted by a broad attachment into the upper surface of the first rib, between...


The nerve descends behind the brachial plexus and the axillary vessels, resting on the outer surface of the Serratus anterior. It extends along the side of the thorax to the lower border of that muscle, supplying filaments to each of its digitations. The brachial plexus is an arrangement of nerve fibres (a plexus) running from the spine (vertebrae C5-T1), through the neck, the axilla (armpit region), and into the arm. ... Serratus anterior Serratus anterior muscle is the surface of upper 9 ribs at side of chest - anterior aspect along entire length of medial border of scapula - (protraction) draws medial border of scapula away from vertebrae (upward rotation). ...


Damage

Due to its long, relatively superficial course, it is susceptible to injury either through direct trauma or stretch. Injury has been reported in almost all sports, typically occurring from a blow to the ribs underneath an outstretched arm. Surgically the long thoracic nerve can also be damaged during surgery for breast cancer, specifically radical mastectomies that involve removal of axillary lymph nodes. Breast cancer is cancer of breast tissue. ... In medicine, mastectomy is the medical term for the surgical removal of one or both breasts, partially or completely. ... The Axillary lymph nodes are of large size, vary from twenty to thirty in number, and may be arranged in the following groups: 1. ...


Injuries to the nerve can result from carrying heavy bags over the shoulder for a prolonged time. There are also reports of isolated damage to this nerve as a variant of Parsonage Turner Syndrome, an autoimmune disease. Parsonage-Turner Syndrome is the name given to a set of symptoms resulting from inflamation of unknown etiology of the brachial plexus. ...


Symptoms are often minimal – if symptomatic, a posterior shoulder or scapular burning type of pain may be reported.


A lesion of the nerve paralyses the serratus anterior to produce scapula winging, which is most prominent when the arm is lifted forward or when the patient pushes the outstretched arm against a wall. However, even winging may not be evident until the trapezius stretches enough to reveal an injury several weeks prior. Serratus anterior Serratus anterior muscle is the surface of upper 9 ribs at side of chest - anterior aspect along entire length of medial border of scapula - (protraction) draws medial border of scapula away from vertebrae (upward rotation). ... When the serratus anterior muscle loses its innervation, it no longer performs its function of holding the scapula against the rib cage. ... Trapezius In human anatomy, the trapezius is a large superficial muscle on a persons back. ...


dorasal scapular nerve is better


Additional images

External links


  Results from FactBites:
 
Long thoracic nerve - Wikipedia, the free encyclopedia (362 words)
It usually arises by three roots from the fifth, sixth, and seventh cervical nerves; but the root from the seventh nerve may be absent.
The roots from the fifth and sixth nerves pierce the Scalenus medius, while that from the seventh passes in front of the muscle.
The nerve descends behind the brachial plexus and the axillary vessels, resting on the outer surface of the Serratus anterior.
IX. Neurology. 6b. The Anterior Divisions. Gray, Henry. 1918. Anatomy of the Human Body. (5780 words)
At the root of the neck it is crossed by the thoracic duct; in the superior mediastinal cavity it lies between the left common carotid and left subclavian arteries, and crosses superficial to the vagus on the left side of the arch of the aorta.
818) arises from the posterior cord of the brachial plexus, and its fibers are derived from the fifth and sixth cervical nerves.
The branches of the ulnar nerve are: articular to the elbow-joint, muscular, palmar cutaneous, dorsal, and volar.
  More results at FactBites »

 
 

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