. Applied anatomy and kinesiology. Fig. 22.—Motor nerve ending in a muscle fiber. (Klein.) If one of the limbs of an animal is severed from its body themuscles in such limb may still be made to contract by stimulatingthe nerve. The motor fibers in the nerve, when stimulated, con-vey the message to the muscle fibers and they contract, just as ifthe message came from the animals nervous system; with thisdifference: muscular actions arising in this way are not regulatedand controlled so as to be useful. The machinery for muscularcontrol lies within the brain and spinal cord. SENSORY NEURONES. The
. Applied anatomy and kinesiology. Fig. 22.—Motor nerve ending in a muscle fiber. (Klein.) If one of the limbs of an animal is severed from its body themuscles in such limb may still be made to contract by stimulatingthe nerve. The motor fibers in the nerve, when stimulated, con-vey the message to the muscle fibers and they contract, just as ifthe message came from the animals nervous system; with thisdifference: muscular actions arising in this way are not regulatedand controlled so as to be useful. The machinery for muscularcontrol lies within the brain and spinal cord. SENSORY NEURONES. The neurones of the sensory system have their cells situated in theso-called spinal gangha on the posterior roots of the spinal nerves(see Figs. 19 and 24). These neurones are of a form utterly unlikethe motor neurones. The cellsare roughly spherical, without den-drites, and with one axone that shortly divides into two. One of these SENSORY NEURONES 47 branches serves as a dendrite; it passes outward along the posteriorroot to the
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