《脑科学》（英文版）The spinal cord

Neural crest Neural tube Sensory (afferent) n Motor Intemeuron (efferent) axons

The spinal cord Metameres White and gray matters G (afferent) matter axon 8-I matter 12 Thoracic Interneuron Motor (efferent axons 最- > Sacral

The spinal cord 8 12 5 5 Metameres White and Gray matters

Bone supports Cerebrum the central nervous system Cerebellum Brainstem Spinal cord

Bone supports the central nervous system

a diagram + the bones Axons ascender to medulla in dorsal columns White sympathetic Dorsal Dorsal chain Dorsal column root Se emental Dorsal nerve Dorsal nsorv neuron in dorsal Lavers root ganglion of dura Inter- Lateral From column neuron sensory eceptor Ventral Ventral Vertebre he T Ventral muscle Ventro(or antero-) column lateral column Motor neuron in ventral hom a metameric organization

A diagram + the bones! A metameric organization

如二如二

Computarized tomography Rotating X rav detectors

Computarized tomography

Magnetic resonance imaging Magnetic coils Magnetic coils that A radiofrequency coil that produce a produce a static field spe head or other bap. ed for (C) Diagram of the machine used to obtain clinical MR static magnetic perpendicular to the the he images. Additional magnetic coils (not shown) Produce lin field in the long iong axis part(not shown) perturbs early varying magnetic field gradients oriented along three axis of the patient the static fields to generate orthogonal axes. (D)An MR image taken in the midsagittal an MRI plane. Note the extraordinary clarity with which all major brain components can be seen (compare with Figure 1.10)

Magnetic resonance imaging