Mental medicine and nursing : for use in training-schools for nurses and in medical classes and a ready reference for the general practitioner . Fic 7-—Diagram of the indirect or involuntary (cerebellar) motor tract(Potts Nervous and Mental Diseases—Lea and Febiger). The cortical cells originate the impulses andcontrol or inhibit the functions of the spinal latter cells receive and distribute the motorimpulses to the muscles, maintain their nutritionand with the sensory cells form reflex centres. 14 MENTAL MEDICINE AND NURSING. Fig. 8.—Diagram of the direct sensory tract. V, VIII, IX
Mental medicine and nursing : for use in training-schools for nurses and in medical classes and a ready reference for the general practitioner . Fic 7-—Diagram of the indirect or involuntary (cerebellar) motor tract(Potts Nervous and Mental Diseases—Lea and Febiger). The cortical cells originate the impulses andcontrol or inhibit the functions of the spinal latter cells receive and distribute the motorimpulses to the muscles, maintain their nutritionand with the sensory cells form reflex centres. 14 MENTAL MEDICINE AND NURSING. Fig. 8.—Diagram of the direct sensory tract. V, VIII, IX, X, sensorybranches of cranial nerves; , Goll and Burdach tracts; , Gowerstract (Van Gehuchten). 3. The indirect motor, or cerebellar, tract, whicharises in the central convolutions of the brain,forms connections with the optic thalamus andthe pons nuclei and passes hence to the cere- NEURONS—TRACTS 15 bellum. From here another series of fibres goesto the tracts in the spinal cord. This tract plays a part in coordinating muscu-lar movements and in automatic acts, and possi-bly in maintaining muscle-tone (see Fig. 7). The Sensory Tracts.—The sensory pathways tothe brain are more complex and difficult of sensory areas may be divided into the threefollowing tracts for each side of the spinal cord:(1) the dorsal tract, comprising the columns ofBurdach and Goll; (2) the ascending anterolat-eral, Gowers tract; and (3) the direct cerebellartract. 1. The fibres of the dorsal tract pass up theposterior columns t
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