PSY 324 Lecture 6: Week 6 - Structure of the Nervous System
13 Dec 2011
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Week 6 - structure of the nervous system. Directions in the nervous system are generally described relative to the neuraxis, an imaginary line drawn through the spinal cord up to the front of the brain. The front end is anterior and the back end is posterior. The terms rostral (toward the beak) and caudal (toward the tail) are also used. The top of the head and the back are part of the dorsal surface, while the ventral (front) surface includes our front. Lateral means toward the outside and medial means toward the midline. We can slice the nervous system in three ways: Parallel to the ground, giving us horizontal sections; Perpendicular to the ground and parallel to the neuraxis, giving us sagittal sections. The midsagittal plane divides the brain into two symmetrical halves. The nervous system consists of the brain and spinal cord, which make up the central nervous system (cns).
