PSYC 207 Lecture Notes - Autonomic Nervous System, Anatomical Terms Of Location, Human Brain
Document Summary
Human brain composed of more than 100 billion neurons. Each neuron receives as many as 15000 connections from other cells. Neurons in the brain are organized in groups and layers called nuclei. Structures that lie on the same side are ipsilateral. If one of them lies in each hemisphere, structures are bilateral. Any movement towards a brain structure is afferent. The sns produces movement and transmits incoming sensory information to the. Cns, including vision, hearing, pain, temperature, touch, and position and movement of body parts. Within the bony case enclosing the cns is a triple-layered set of membranes, the. The outer dura mater is a tough double layer of tissure enclosing the brain in a kind of loose sack. The middle arachnoid membrane is a very thin sheet of delicate tissue that follows the contours of the brain. The inner pia mater is a moderately tough tissue that clings to the surface of the brain.