The Relation of Science and Religion.pdf - Online Christian Library

HIGHER ORGANISMS. 227of the organ are two great central bodies,known as the basal ganglia, and consistingof nerve fibres massed together with greymatter around them, that in front being chieflymotor nerves brought to a junction, thelatter sensory nerves combined in like manner.The same arrangement holds in bothhemispheres, thereby providing that the respectivemasses of motor, and of sensorynerves lie exactly opposite each other. Behindthese in the centre, lying in a positionunder both hemispheres are four small bulbsconnected with the nerves of vision, and alsowith the cerebellum; and behind them, coveredby the posterior lobe of the brain is thecerebellum itself, or little brain, largely concernedwith coiirdination of movements, orequilibrium of the two sides of the system.Just below these arrangements the two greatcords of nerve fibre descend towards thebody, which are covered by a t'ransversemass, known as the bridge, appearing completeas a crossing, and containing transversefibres from the cerebellum, as well as a seriesof longitudinal fibres. Immediately underneaththe bridge are pillars or masses ofnerve, constituting the crowning portion of