MOTOR, SENSITIVE AND SYMPATHETIC CELLS. 299 



many-branched (polyclonous}* A multipolar cell is a 

 body with a large nucleus, granular contents and, if it 

 be particularly large, a spot of pigment, and is provided 

 with processes running in different directions. These 

 processes often divide into twigs and thus commences the 

 condition of which I have already spoken (p. 290), that 

 whole masses of filaments or fibres proceed from one 

 point a condition which indicates, that, in the first in- 

 stance indeed according to circumstances, one path or 

 another can be made use of, but that, when once a path 

 has been chosen leading in the direction of the periphery, 

 the impulse must be propagated in a relatively equable 

 manner throughout the whole series of ramifications. 

 These multipolar forms (Fig. 89, A) are mostly compara- 

 tively large, and lie accumulated in those parts which 

 are subservient to the motor functions ! and they there- 

 fore may be briefly designated motor cells. 



Those forms which correspond to the sensitive spots 

 (Fig. 89, B] are usually smaller and do not present such 

 an extraordinary luxuriance of ramification as the larger 

 ones. A large portion of them possess only three, or 

 perhaps, four branches. Those which Jacubowitsch has 

 called sympathetic are, on the other hand again, larger, 

 but have still fewer branches and are distinguished by a 

 greater roundness of shape. These are differences which 

 are certainly not so decided, as to enable us already at 

 once to determine in every single case from the appear- 

 ance of a ganglion-cell to which category it belongs ; but 

 still, if we consider the individual groups, they are so 



Fig. 89. Ganglion-cells from the great nervous centres ; A., , G from the spinal 

 cord, from preparations belonging to Herr Gerlach, D from the cortex of the cere- 

 brum. A. Large, many-rayed cell (multipolar, polyclonous) from the anterior 

 horns (motor cell). B, Smaller cells with three large processes, from the posterior 

 horns (sensitive cells). C. Two-rayed (bipolar, diclonous), more rounded cell, 

 from the neighbourhood of the posterior commissure (sympathetic cell). 800 dia 

 wieters. 



* trt.uv, uV')f, a shoot, twig. TR. 



