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Human anatomy, including structure and development and practical considerations . Multipolar nerve-cells of various forms; .1, from spinal cord ; B. from cerebral cortex; C, from cerebellar cortex(Purkinje cell) ; ii, axone; r, ini|)lantation cone. the multipolar neurones of Golgis type II, whose axones almost immediatelyundergo elaborate branching within the gray matter to which they are confined.The Nerve-Fibres.—From the foregoing considerations it is evident that thenerve-fibres are not independent elements, but that all are the processes of neurones—either the axones of those that are pro

Human anatomy, including structure and development and practical considerations . Multipolar nerve-cells of various forms; .1, from spinal cord ; B. from cerebral cortex; C, from cerebellar cortex(Purkinje cell) ; ii, axone; r, ini|)lantation cone. the multipolar neurones of Golgis type II, whose axones almost immediatelyundergo elaborate branching within the gray matter to which they are confined.The Nerve-Fibres.—From the foregoing considerations it is evident that thenerve-fibres are not independent elements, but that all are the processes of neurones—either the axones of those that are pro Stock Photo
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The Reading Room / Alamy Stock Photo

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2AWGME1

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7.1 MB (183.8 KB Compressed download)

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1120 x 2230 px | 19 x 37.8 cm | 7.5 x 14.9 inches | 150dpi

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Human anatomy, including structure and development and practical considerations . Multipolar nerve-cells of various forms; .1, from spinal cord ; B. from cerebral cortex; C, from cerebellar cortex(Purkinje cell) ; ii, axone; r, ini|)lantation cone. the multipolar neurones of Golgis type II, whose axones almost immediatelyundergo elaborate branching within the gray matter to which they are confined.The Nerve-Fibres.—From the foregoing considerations it is evident that thenerve-fibres are not independent elements, but that all are the processes of neurones—either the axones of those that are prolonged into fibres (type I), or the dendritesof those situated within the spinal and other sensory peripheral ganglia. Althoughneurones exist which are not continued as nerve-fibres, the latter are alwa^•s connected rill-: Ni:R()i s rissuKS. lOOI Im(;. S42.. Axis-cvliiulers Axolcniina Medullary sheath Node of Kaiix let Xeutileinma Medullated iierve-fibres, as seen in longi-tudinal sections of spinal nerve. X 500. with iK-iirones. Reconniziiit;, tin ix-loic, that thi- ncrc-fibres arc only processt-s otlUUioiics, their separate descrijition is justified only as a matter of convenience.The fmulaniental |)art of every nerve-tihre is the central cord, coinnKjnly knownas the axis-cylinder, which is composed of threads of great delicacy, the ax/s-fibrillce, prolonged from the nerve-cell and embcdtled within a semifluid interfihrillarsubstance, the neuroplasm, the entire cord so con-stitiiteil being enclosed by a delicate structiwelesssheath, the axolcniina. The existence of theaxolcmma as a distinct sheath, lu)vvever, is ciues-tionable, the appearance of such investment notimprohal)lv being due to a local condensation ofthe framework of the medullary coat immediatelyaround the axis-cylinder. In the case of the typical fibres, such as formthe ch

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