PSYCH261 Lecture Notes - Lecture 3: Pia Mater, Olfactory Bulb, Auditory Cortex

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH261
• Professor: Roxane Itier Itier

Document Summary

Directions in the nervous system are described relative to the neuraxis, an imaginary line drawn through the length of the central nervous system, from lower end of the spinal cord up to the front of the brain. Ipsilateral: refers to structures on the same side: e. g. If we say the olfactory bulb sends axons to the ipsilateral hemisphere it means that the left olfactory bulb sends axons to the left hemisphere and the right olfactory bulb sends axons to the right hemisphere. Contralateral: refers to structures on the opposite sides of the body: e. g. If we say that a region of the left cerebral cortex controls movements of the contralateral hand then it means that the region controls movement of the right hand. The brain is covered by the skull and the spinal cord is encased by the vertebral column. The protective sheaths around the brain and spinal cord are called meninges (membrane).