PSYB65H3 Lecture Notes - Lecture 2: Vagus Nerve, Cerebral Cortex, Hypothalamus
Document Summary
The nervous reflex arc: peripheral nervous system. The stimulus is identified by a receptor cell (reception) which initial a nervous/electrical signal. The signal is transmitted (transmission) via an afferent neuron to the central nervous system: central nervous system. The afferent signal is integrated by the central nervous system neurons, which means that the neural messages are sorted and integrated. This i(cid:374)tegratio(cid:374) (cid:373)ay sti(cid:373)ulate effere(cid:374)t (cid:894)outgoi(cid:374)g(cid:895) (cid:374)euro(cid:374)s that"s tra(cid:374)s(cid:373)it sig(cid:374)als to effector orga(cid:374)s such as nerves/glands. When the signal reaches the effector it is interpreted as actions the body does such as moving the hand away from a hot stove. Hindbrain contains the medulla oblongata + pons + cerebellum: medulla oblongata: contains the control centre for cardiovascular & respiratory function, pons: important relay site & involved in involuntary control, cerebellum: balance & motor coordination. Size decreases as the vertebrae gets bigger in size. Forebrain contains the cerebral hemispheres (cerebrum, cerebral cortex) consciousness.
