FIBRES OF THE INTERNAL CAPSULE OF THE BONNET MONKEY. 
79 
Character of the Movements of the Parts Reiwesented in the Fibres of the 
• Internal Capsule. 
We have given at pp. 60-63 the antero-posterior arrangement in the capsule of the 
movements of the different parts of the body (see Table), we now furnish two tables 
(see Tables IV. and V.) in the latter of which again taking the whole capsule as 100, 
the extent of representation of each kind of movement of the several parts of the 
body is given. 
We wish first to review the Table IV., given on p. 78, in detail, to see how far the 
order of arrangement of representation of parts, be,, independently of the character of 
the movement of such parts in the capsule, agrees or disagrees with the arrangement 
which we have shown to exist in the cortex. 
The accompanying diagram (fig. 7) the details of which we have partly published 
in the ‘Philosophical Transactions,’ 1887-88, the remainder being in course of 
publication, gives in bare outline the relative positions of the points of chiefest 
representation as we have found them, by minimal excitation, to exist in the cortex 
of the Bonnet Monkey {Macaeus sinicus). 
With this outline before us we would suggest that the main axes of the fibres of 
the internal capsule correspond as far as antero-posterior arrangement goes with lines 
drawn at right angles to the direction of the upper two-thirds of the fissure of 
Rolando. It also remains to be seen whether there is any relation between the 
arrangement in the cortex in the horizontal antero-posterior division and the order 
of fibres in the capsule. 
Table IV. contains the antero-posterior arrangement of the average position of the 
representation in the capsule of the various parts of the body, set out horizontally. 
Although each observation is placed vertically under each other, this is not neces¬ 
sarily true of their anatomical position, as we have already shown. 
It substantiates our view that the oblique lines over the “ motor ” cortex described 
above give truly the order of representation in the capsule. For while the move¬ 
ments of opening the eyelids and of the eyes are seen to occur in front in both cortex 
and capsule, those of the toes are equally the most posterior. Hence placed in order 
from before back we have eye movements, head movements, upper limb movements, 
trunk and lower limb movements. 
Or stating in further detail the order of the representation as given in the fore¬ 
going table in the average position of each segment in each part of the body, the 
following general order of representation is arrived at, viz. ;— ■ 
