PSYC 100 Lecture Notes - Botulinum Toxin, Neuromodulation, Stereopsis

• School: McGill University
• Department: Psychology
• Course: PSYC 100
• Professor: Ingrid Johnsrude

Document Summary

Central nervous system: brain and spinal cord. Brain and spinal cord protected by meninges: 3 layered set of membranes, dura matter, arachnoid membrane, pia matter. Brain and spinal cord float in cerebrospinal fluid (csf) fills space between two meninges: provides a shock-absorbing cushion. Brain"s capillaries do not have openings: blood-brain barrier= prevents some substances from passing from blood into brain. Arteries carry fresh blood to the brain. Veins and sinuses carry used blood away from brain. Surface of cerebral hemisphere is covered by cerebral cortex: called grey matter, contains billions of nerve cells, perceptions, memories, plans. Nerves in cerebral cortex are connected to other parts of the brain by white matter: abundant in axons, instead of cell bodies. Cerebral cortex is wrinkled to increase surface area: bulges= gyri, grooves= sulci, fissures cells. Glial cell: provides support for neurons and supplies them with essential. Neurons communicate with other cells by forming synapses.