PSYCH 101 Lecture Notes - Lecture 3: Neuropsychological Test, Axon Terminal, Hindbrain

• School: UW
• Department: Psychology
• Course: PSYCH 101
• Professor: Pickrell Jacqueline

Document Summary

Emphasized the importance of experimental research of the brain. Carefully controlled the experiments on the animals to determine localities of brain and their functions. Moved the field of brain research into a more scientific arena. Nervous system: an interacting network of neurons hat conveys electrochemical information throughout the body. Neurons- cells in the nervous system that commutate with one another to perform information-processing tasks. Dendrites (the receiving portion of the neurons) Myelin sheath (insulating of the fatty material) Form blood-brain barrier to protect the brain. Se(cid:374)sor(cid:455) (cid:374)euro(cid:374)s (cid:894)(cid:862)he(cid:455) so(cid:373)eo(cid:374)e hit (cid:373)e! (cid:863)(cid:895) Motor neurons interneurons (connective function. link sensory and motor neurons) Three steps in the activation of nerve impulses. Action potential occurs when a neuron is stimulated. Positive sodium ions enter the neuron, causing brief depolarization. All-or-none-law: action potentials occur either at a uniform intensity, or they do not occur. Absolute refractory period- immediately following the action potential. Membrane is not excitable and cannot discharge another impulse.