. Anatomy, descriptive and applied. Anatomy. JPAMTS DERIVED FROM THE FORE-BRAIN mi The axones of corticifiigal neurones proceed to the nucleus of the superior quadri- geminal body along the optic radiation/ Some fibres are detached from the optic tract and course through the crus cerebri to the oculomotor nucleus. These fibres are small, and are believed to he afjferent branches for the Sphincter pupillse and Ciliary muscles. The connections of the external geniculate body and pulvinar with the higher cortical centre of vision are established by neurones, the cells of which lie in the two gang
. Anatomy, descriptive and applied. Anatomy. JPAMTS DERIVED FROM THE FORE-BRAIN mi The axones of corticifiigal neurones proceed to the nucleus of the superior quadri- geminal body along the optic radiation/ Some fibres are detached from the optic tract and course through the crus cerebri to the oculomotor nucleus. These fibres are small, and are believed to he afjferent branches for the Sphincter pupillse and Ciliary muscles. The connections of the external geniculate body and pulvinar with the higher cortical centre of vision are established by neurones, the cells of which lie in the two ganglia just mentioned, and whose stream in an arched, more or less PULVINAR —1 LAT. GENICULI MEDIAL GENICU- LATE BODY SUPERIOR QUADRI- GEMINAL BODY OCULOMOTOR. OCCIPITAL CORTEX Fig. 672.—Scheme showing central connections of the optic nerve and optic tract. compact bundle in the white substance of the cerebral hemisphere toward the occipital cortex. Another system of neurones, whose cells lie in the cortex, sends its axones in the reverse direction (cortifugal) to the two lower centres. The cerebral tract thus formed between primary and secondary (cortical) centres is called the optic radiation (Fig. 712), to be studied more fully in the sequel. The components of the optic path are delineated schematically in Fig. 672. * Centrifugal fibres ending in the retina, and probably arising from cells been discovered in the optic tracts. I the superior quadrigeininal body, have. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gray, Henry, 1825-1861; Spitzka, Edward Anthony, 1876-1922. Philadelphia, New York, Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
