PSYC1002 Lecture Notes - Lecture 8: Spinal Cord, Corpus Callosum, Intracranial Pressure

• School: University of Sydney
• Department: Psychology
• Course: PSYC1002
• Professor: Caleb

Document Summary

Blood brain barrier: blood supply to brain, brain is very energy demanding: <2% of body by weight, but requires 15% of total blood flow and uses 25% of oxygen consumption. The spinal cord: pi(cid:374)al (cid:272)ord is a (cid:272)a(cid:271)le of (cid:374)eural fi(cid:271)res (cid:449)ith (cid:862)roots(cid:863) (cid:271)ra(cid:374)(cid:272)hi(cid:374)g off, an interface between the brain and peripheral nervous system: directly connected to sensory, motor, and autonomic. At base of brain like a swollen head on top of spinal cord. Damage to brainstem following head injury leads to coma and death (increase in intracranial pressure squashes brainstem: cere(cid:271)ellu(cid:373) (cid:894)(cid:862)s(cid:373)all (cid:271)rai(cid:374)(cid:863) o(cid:374) top of (cid:271)rai(cid:374)ste(cid:373)(cid:895) Control of precision movements (including learned ones: thalamus and hypothalamus (on top of brainstem) Thalamus is sensory relay to cortex (and more) Hypothalamus is involved in hormonal regulation and motivational control (feeding and sex: limbic system (wrapping around thalamus) Involved in control of emotion and memory: basal ganglia (wrapping around thalamus)