EXAMINATION OF SOME SPINAL NERVES 
Degeneration was found in the nerve twigs of the following muscles : — * 
deltoicleus. 
teres major, 
suhclavius. 
teres minor, 
suhscapularh. 
iuprasphiatus. 
infraspinatus, 
biceps. 
latissimus dorsi. 
coraco-brachialii. 
brachialis anticus. 
supinator longus. 
extensor carpi radialis longior. 
extensor carpi radialis brevtor. 
r triceps, in outer and inner heads (but slight degeneration 
only). 
I supinator brevis. 
j. flexor carpi ulnaris (slight degeneration). 
extensor communis digitorum (a few fibres only). 
r extensor longus pollicis (a few fibres only). 
J extensor ossis metacarpi pollicis (six fibres only). 
I flexor longus pollicis (a few fibres only). 
In both experiments - 
In one experiment, not 
in both 
In both experiments 
In one experiment, not 
in both 
It will be seen that the five last mentioned muscles were not noticed by the previous 
method to respond to the excitation of the Vlth cervical root ; the teasing method was carried 
out only after the examination made by the excitation method above described, and it is possible 
that if its results had been known, and particularly minute attention paid to the above muscles, 
some trace of contraction might have been found ; but it seems clear that, if detectible, it was so 
slight as to have escaped a careful search, I am, therefore, inclined to consider the amplification 
of the list obtained by the purely microscopical method of teasing to be explicable, not by 
individual variation, but by a greater delicacy of the 'teasing' than of the previous method. 
Allowing twenty muscle fibres to each neuron, the six neurons contributed by the Vlth cervical 
segment to the motor innervation of the extensor ossis metacarpi pollicis might — especially if, as is 
most probable,t scattered about the thickness of the muscle — under excitation evoke no appreciable 
contraction in the muscle. 
* The serratus niagnus and pectoralis major were not included in the search by teasing, partly on account of their size, partly 
because the labour was believed to be superfluous, 
•f- Sherrington, 'Lumbosacral plexus,' 'Jourii. of Physiol.', vol. 13, 1S92, p. 751. 
