BIOL1002 Lecture Notes - Lecture 2: Striatum, Substantia Nigra, Basal Forebrain
Document Summary
Interneurons connect neurons within specific regions of the cns, linking sensory & motor neurons, & branch extensively. Satellite cell process info (grey matter areas mostly) pyramidal cell sends info, bigger cell body- more nutrition to support long axon. In general, aps that reach the synaptic knobs cause a neurotransmitter to be released into the synaptic cleft: synaptic cleft the gap between the pre and postsynaptic neuron. Sound wave sound wave into ear hits outer hair cells. Receptor outer hair cells are anchored in membrane. Movement of membranes/air drum causes cochlear fluid to move past inner hair cells, bending the cilia. Bending causes changes to calcium channels in outer hair cells, leading to calcium influx. Calcium leads inner hair cells to neurotransmitter. Stimulates neurotransmitter stimulates action potential in auditory neurons. Influences trans-membrane ion flow either to increase (excitatory) or to decrease (inhibitory) the probability that the post-synaptic cell will produce an ap: four steps: synthesis, release, receptor action, inactivation.
