psl 431 exam 2 stephenson review

psl 431 exam 2 stephenson review - lecture # 15 CNS:...

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lecture # 15 CNS: containsblood vessels, connective tissue, glial cells, neurons glial cells: physical and chemical support for neurons soma - cell body of neuron white matter - mylenated axons grey matter - cell bodies and dendrites neuclius - cluster of neuron cell bodies in CNS ganglion - clustion of neuron cell bodies in the PNS pathway/tract - axon bundle in CNS nerve - axon bundle in PNS Forebrain  = Cerebrum + Diencephalon Cerebrum = Cerebral cortex + Corpus callosum + Sub-cortical nuclei. Cerebral cortex: Outer gray matter and inner white matter – deeply folded and lobed. Essential for sensation, perception, reasoning, learning, memory, and generation of skilled movements. Sub-cortical nuclei - (basal nuclei, basal ganglia). Diencephalon = Thalamus + Hypothalamus Thalamus: Synaptic relay station in sensory pathways. Hypothalamus: Control center for bodily homeostasis. Hypothalamus connected to pituitary gland (hypophysis). - regulates temp., water balence, appetite, emotional and reproductive  behavior pituitary - controlls other glands Brainstem  = Midbrain + Pons + Medulla ------------------------ vertebral bodies - front section of the vertebra spinous process - rear section of the vertebra. ...bumps on back vertebral foramen - opening for spine in center
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intervertibral foramina - space between vertebra for nerves to leave the spine naming -  spine anatomy - grey matter forms H shape surrounded by white matter - dorsal horns - rear for sensory neurons and interneurons - ventral horns - front for motor neurons - dorsal root ganglion - contains cellbodies for sensory  nerves. ..in  intervertibroforamen **- ventral root - motor info out of spine. ..**cellbodies inside  spine unlike affarent - vetebral nabes and numbers start and neck A) cervical #'s 1-7. ..nerves are 1-8 bc/ 1 nerve abovec #1  vertebra B) thorasic #'s 1-12. ..nerves numbered by the vertebra above  them C) lumbar #'s 1-5 D) secral #'s 1-5 E) tailbone - coccyx spinal level - same as the level for spinal nerve somatic affarent neurons - exterior and skelital muscle sensation visceral affarent neurons - internal organ sensation effarent (somatic and viceral) are the same but in opposite direction viceral effarents also called AUTONOMIC. .innervate cardiac,  smoothmuscles and glands can cause EXCITATION OR INHABITION. .depends on NT and target  receptor SEN's always excitatory via nAch
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heart controll - innervation by VEN . ..norepinephrine > beta adrenergic receptors Ach > mAch receptors ***SEN - always excitatory ***VEN - either excitatory or inhibitatory. ..(think heart) lecture #16 spine anatomy cont. spinal cord ends at the L2 vertibral level
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This note was uploaded on 03/31/2008 for the course PSL 431 taught by Professor Stephenson during the Fall '07 term at Michigan State University.

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psl 431 exam 2 stephenson review - lecture # 15 CNS:...

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