BIO202H5 Lecture Notes - Lecture 8: Central Nervous System, Parasympathetic Nervous System, Special Senses
Document Summary
Neuron bundles in nerves (groups of neurons/axons) provide connections between cns and pns (peripheral nervous system) Afferent branches send internal and external stimuli to cns. Efferent branches send signals to pns (can be autonomic or somatic) This is done by the body (involuntary) A synapse in cns and a synapse close to the target organ. Soma of preganglionic neuron is in the brainstem or sacral (bottom of spinal cord) Soma is in the ganglion near the target organ. Soma of preganglionic neuron is in the spine. Soma is in the sympathetic ganglion, located next to the spinal cord. Sensory or autonomic nerves from spinal cord. The yellow bundles represent the cranial nerves. They have a connection to the ears, eyes. For special senses, the cranial nerves are important. Axons connecting different parts of grey matter to each other. The spinal nerve contains the dorsal and ventral root. Ganglia is bundle of nerves where information is processed.
