The anatomy of the nervous system, from the standpoint of development and function . Cheeks, Jaws, Lips in Fig. 236). From all the restof the motor cortex arise the fibers of the corticospinal tract. EFFKRKNT PATHS AND REFLEX ARCS 319 The motor path for the spinal nerves Includes the corticospinal tra< 1 and thespinal primary motor neurons. Neuron I, or upper motor neuron. The gianl pyramidal cells of the motorcortex give rise to the fibers of the corticospinal trad, which is also known as !? 1 in 1 longitudinalis cerebriRadiatio corporis callostx Septum pellucidum llexus cliorio-ideus vent
The anatomy of the nervous system, from the standpoint of development and function . Cheeks, Jaws, Lips in Fig. 236). From all the restof the motor cortex arise the fibers of the corticospinal tract. EFFKRKNT PATHS AND REFLEX ARCS 319 The motor path for the spinal nerves Includes the corticospinal tra< 1 and thespinal primary motor neurons. Neuron I, or upper motor neuron. The gianl pyramidal cells of the motorcortex give rise to the fibers of the corticospinal trad, which is also known as !? 1 in 1 longitudinalis cerebriRadiatio corporis callostx Septum pellucidum llexus cliorio-ideus ventriculi jj^flllateralis Corona radiata Columna,fornicisPlexus chorio-ideus ventriculi tertiiCaosula interna Thalamus Ventriculus tertiusFossa inter-peduncular(iarini) Cornu inferiusventriculilateralis Pedunculu-cerebri Brachium pout Fasciculi longitudi- nales (pyramidalcs) pontis Facies inferior cerebelli-Fibrae pontis superficiales Pyramis medullae oblongatae , 1 .) 111; frontalis superior , Truncui cprporii callosi _ Cornu anlinil v< ntriculi lateralis Caput nuclei caudati. Globus pallidusTractus opticus N. trigeminus Nn. facialis undacusticus FlocculusglossopliaryngcusJ. vagus^Nucleus olivaris inferiorv-» Decussatio pyramidum . Fig. 238.—Section through the brain in the axis of the brain stem, showing the entire extent of the corticospinal tract. (Toldt.) the cerebrospinal fasciculus or pyramidal tract. These fibers traverse the rost ralhalf of the posterior limb of the internal capsule, the intermediate three-fifthsof the basis pedunculi, the basilar portion of the pons, and the pyramid of themedulla oblongata, and after undergoing a partial decussation are continued intothe spinal cord (Figs. 237, 238). At the pyramidal decussation in the caudal \20 THE NERVOUS SYSTEM part of the medulla oblongata the greater part of the tract crosses to the oppositeside oi the spinal cord and is continued as the lateral corticospinal tract in thelateral funiculus. The smaller part is
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnervoussystem, bookye
