brachial plexus
DESCRIPTION
brachial plexus notesTRANSCRIPT
BRACHIAL PLEXUSA network of nerves that conducts signals from the spinal cord, which is housed in the spinal canal of the vertebral column (or spine), to the shoulder, arm and hand.
C5, C6, C7, C8, T1
Position
Roots: Posterior to the scalenus muscleTrunk: Posterior triangle of the neckDivisions: Behind clavicle
Reach To Drink Cold BeerRoot Trunks Divisions Cords Branches
Triangle of the neck
Apex: Union of the sternocleidomastoid and
the trapezius muscles at the superior nuchal line of the occipital
bone
Anterior: Posterior border of the sternocleidomastoideus
Posterior: Anterior border of the trapezius
Base: Middle one third of the clavicle
Brachial Plexus: Terminal Branches in Arm and Forearm
Carpal Tunnel Syndrome
Cause:Tendonitis (inflammation) of flexor retinaculum from overuseMedian nerve entrapment
Findings:-Numbness-Tingling or sensory loss-Atrophy of Thenar Eminence
Associated factors:MEDIAN TRAPMyexedemaEdemaDiabetesIdiopathicAcromegalyNeoplasmTraumaRheumatoid arthritisAmyloidosisPregnancy
Lesion of Brachial Plexus
From roots:
5 6 7, Wing to HeavenLong thoracic nerve=winging scapula
From roots/trunks:
Erb Duchenne Palsy
Upper trunk lesion C5-C6Cause:
Trauma Traumatic birth
Findings: Limb hanging by side Medially rotated Pronated forearm
Klumpke’s Palsy
Lower trunk lesion C8-T1Cause:
Pancoast tumour Traumatic birth (hand pulled, affect T1)
Findings:RUM (Radial, Ulnar, Median nerves)
Loss of all lumbricals (all fingers are clawed) Forearm flexors and extensors lost