Brachial Plexus AnatomyCredit: http://www.oocities.org/medipedia/9129.htm

The brachial plexus anatomy is one of the most complex structures in the human body. It is a network of nerve fibers that control most of the muscles of the upper extremities. Because of this, the brain could communicate with the muscles. An individual can control the muscles of the upper limb voluntarily and feel different sensations applied to its deep and superficial layer. Studying this portion of the body can give additional knowledge and understanding on how the brachial plexus works.

Overview of the brachial plexus anatomy

The brachial plexus runs along the neck, armpit, and arm. It originated from the spinal column, specifically the lower four cervical vertebrae to the first vertebra of the thoracic region. The brachial plexus anatomy is composed of nerves that send signals to the brain and receive signals from the brain. There are 17 nerves in the brachial plexus and each of them controls various muscles.

  • Ulnar nerve - Brachial Plexus AnatomyCredit: http://apmsurgery.com/Diagnoses/Elbow.htmlUlnar nerve – controls the flexor carpi ulnaris and the flexor digitorum profundus
  • Forearm medial cutaneous nerve - Brachial Plexus AnatomyCredit: http://classes.kumc.edu/sah/resources/handkines/nerves/medialcutan.htmForearm medial cutaneous nerve – middle skin of the forearm
  • Arm medial cutaneous nerve – anterior and middle aspect of the arm
  • Middle portion of the median nerve - Brachial Plexus AnatomyCredit: http://orthopedics.about.com/cs/carpaltunnel/a/carpaltunnel.htmMiddle portion of the median nerve – controls part of the hand not controlled by the ulnar and radial nerve
  • Medial pectoral nerve - Anatomy of Brachial PlexusCredit: http://www.med.mun.ca/anatomy/imagedb/nerv_sys/ul_innervation/pages/005_MedPec_Nerve057.htmlMedial pectoral nerve – controls major and minor pectoralis
  • Musculocutaneous nerve - Anatomy of Brachial PlexusCredit: http://health.yahoo.net/human-body-maps/musculocutaneous-nerveMusculocutaneous nerve – cutaneous nerve of the lateral part of the forearm; controls the biceps brachii, brachialis, and coracobrachialis
  • Suprascapular nerve - Anatomy Brachial PlexusCredit: http://www.med.mun.ca/anatomy/imagedb/nerv_sys/ul_innervation/pages/053_SuprascapularNerve_2_284.htmlSuprascapular nerve – controls infraspinatus and supraspinatus
  • Subclavian nerve - Anatomy Brachial PlexusCredit: http://sfgh.medicine.ucsf.edu/education/resed/procedures/centrallines/Subclavian nerve – controls the subclavian muscle
  • Radial nerve – controls the extensor muscles of the forearm, brachioradialis, triceps brachii, anconeous, and supinator
  • Axillary nerve - Anatomy Brachial PlexusCredit: http://www.nlm.nih.gov/medlineplus/ency/imagepages/8729.htmAxillary nerve – control deltoid and teres minor muscles
  • Inferior nerve of the subscapular - Brachial Plexus AnatomyCredit: http://www.rad.washington.edu/academics/academic-sections/msk/muscle-atlas/upper-body/teres-majorInferior nerve of the subscapular – subscapularis and teres major
  • Middle subscapular nerve - Brachial Plexus anatomyCredit: http://www.rad.washington.edu/academics/academic-sections/msk/muscle-atlas/upper-body/infraspinatusMiddle subscapular nerve – latissimus dorsi
  • Thoracic nerve - Brachial Plexus anatomyCredit: http://markyoungtrainingsystems.com/tag/long-thoracic-nerve/Thoracic nerve – serratus anterior
  • Posterior nerve of the scapula - Brachial Plexus anatomyCredit: http://www.coursehero.com/flashcards/5208/Anatomy-of-upper-and-lower/Posterior nerve of the scapula – levator scapulae and rhomboid muscles

 

General Characteristics of the Brachial Plexus Anatomy

Anatomy of the Brachial PlexusCredit: http://www.concordortho.com/patient-education/topic-detail-popup.aspx?topicID=058683b55d974f2952a2995f76121bef

The divisions of the brachial plexus anatomy are called the rami. The roots of the plexus nerves are located From C5 to T1. There are five roots that originated from this area and will merge along the neck which will compose the trunks. Each of these trunks would eventually divide into six rami until they will merge again to form three cords.

Diseases that Pertain to the Anatomy of Brachial Plexus

Anatomy of Brachial PlexusCredit: http://www.erbspalsyonline.com/

The nerves are very important for the proper voluntary control of the muscle groups and for cutaneous sensation. A number of diseases and disorders are connected to the brachial plexus anatomy over the centuries. Some of these medical diagnoses that particularly involve the brachial plexus are Erb palsy, brachial neuritis, burner syndrome, thoracic outlet syndrome, and Klumpke palsy.

Summary of the Anatomy of Brachial Plexus

The brachial plexus anatomy is truly an amazing structure of the body. It is a system of nerves that control the entire upper extremities with some exception. These nerves also allow us to feel sensations on our skin.

If there would be damage to the brachial plexus, dire consequences may ensue. Make sure that you understand the brachial plexus anatomy to fully take care of it.