PHAR 100 Lecture 6: PHAR100 W2L3 Notes

• School: Queen's University
• Department: Pharmacology and Toxicology
• Course: PHAR 100
• Professor: Bill Racz

Document Summary

Basic functions of the nervous system: recognize. Changes in the internal or external environment. E. g. change in external temperature (28oc vs 0oc) E. g. body feels hot or cold the environmental changes are perceived: react. Produce a response or an action to the environmental changes. Conducts signal to and from the brain. Divided into two hemispheres: left and right. Subdivided into 4 lobes: occipital: vision, temporal: hearing, parietal: sensory perception, frontal: higher-level cognitive functions, thalamus, hypothalamus. Relay station for sensory and motor information to cerebral cortex. Integration of the autonomic nervous system: e. g. sleeping, body temperature. Controls hormonal output of the pituitary gland: e. g. hormone releasing factors, pituitary gland. Cns: brainstem: connected to upper part of spinal cord, divided into three parts. Medulla: all impulses between brain and spinal cord pass through brainstem, regulation of vital body functions. E. g. blood pressure, heart rate, respiration: behavioural responses. Cns: cerebellum: connected to brainstem by large fibre tracts.