PSY290H5 Lecture Notes - Lecture 3: Pyramidal Cell, Multipolar Neuron, Grey Matter
Document Summary
Neurophysiology: the generation, transmission, and integration of neural signals. Motor neurons carry information, usually across large distances to muscles and glands (efferent) sensory neurons bring information from stimuli to the brain (afferent) interneurons connect afferent and efferent circuits together. Golgi-stained pyramidal and stellate neurons pyramidal neurons are usually excitatory neurons stellate neurons are the main type of inhibitory neurons (suppressing signals) shape and sculpt connections (the (cid:862)(cid:271)(cid:396)akes(cid:863) o(cid:374) (cid:374)eu(cid:396)o(cid:374)al a(cid:272)ti(cid:448)it(cid:455)(cid:895) Carry signals from one neuron to another via action potentials. Can be very short in nature (only a few nanometers), but can also be as long as something connecting from your brain to the bottom of your foot (a couple of meters) Transport of information needs to be supported by something: myelination: gaps in axons are known as nodes of ranvier (usually spaces about 20 to 200 microns apart from each other) Glial cells assist neuronal activity by providing raw materials, chemical signals, and structure.
