Compressive Syndrome of N. Axilliaris C 5-6

constitution of nerve      

motor innervation

m. deltoideus

m. teres minor

sensor innervation          

responsible for the innervation of the upper outer part of the arm over the middle part of the deltoid muscle

muscular function 

 

M. DELTOIDEUS

it lifts the arm to the horizontal see modificated examination of abduction at muscular test. The restricted abduction in the shoulder joint at the compressive syndrome of n. axillaris can seem as a picture of  a frozen shoulder a passive motility is not restricted!!

(M. supraspinatus, m. trapezius, m. biceps brachii and scapular muscles can partly substitute the function of the deltoid muscle. But more serious disorders of n. axillaris prejudice the function of the arm in a radical way.

symptom     

atrophy of the deltoid muscle which distinctly changes a configuration of the shoulder

weakness of strength at the examination of abduction horizontally

causes

a strong impact on the shoulder, often luxation or subluxation of the shoulder joint (at following immobilization - paralysis of a nerve can be unrecognized)

pain

is not there

disorder of sensitiveness

shedding of sensation is little notable

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Picture of the sensory innervation of n. axillaris