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Canada (161,659)
Neuroscience (289)
NROB60H3 (151)
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Chapter 7

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CHAPTER 7A slice is a section to slice is to sectionStandard approach to making a cut is to make the cut parallel to one of the three anatomical planes of section 1 Midsagittal Plane splits the brain into equal right and left halves a cut parallel to this plane is the sagittal plane 2 Horizontal Plane parallel to the ground splitting the brain into dorsal and ventral parts cuts eyes and ear at same time 3 Coronal Plane perpendicular to the ground and the sagittal plane splits the brain into anterior and posterior parts cuts either eyes or ears Central Nervous SystemConsists of the parts of the NS that are encased in a bonebrain and spinal cordThree parts of the brain that are common to all mammals cerebrum cerebellum brain stem a Cerebrumrostralmost and largest part of brainsplit into two cerebral hemispheres by the deep sagittal fissure medial longitudinal fissure Right controls Left and Left controls Right b CerebellumLatin little brain actually contains as many neurons as both cerebral hemispheres combinedprimarily a movement control center that has extensive connections with the cerebrum and the spinal cord R controls L and L controls Rc Brian Stemforms the stalk from which the cerebral hemispheres and the cerebellum sproutresponsible for regulation of breathing consciousness and body temperaturemost important to life more than cerebrum and cerebellumdamage to brain stemdeath d Spinal Cordencased in bony vertebral column and attached to brain stemMajor conduit of information from skin joints and muscles of body and vice versa A transaction of the spinal cord results in anesthesia in skin and paralysis of the muscles in parts of the body caudal to the cut 9muscles can function but cannot be controlled by the brain Communicates with the body via spinal nerves PNS which exit the spinal cord through the notches of each vertebra Each nerve has two root attachments to spinal cordDorsal Root axons carrying info to spinal cord sensoryFrancois MagendieVentral Root axons carrying info away from spinal cord motorCharles Bell Peripheral Nervous System Has two parts Somatic PNS and Visceral PNS Somatic PNSAll the spinal nerves that innervate the skin joints and muscles that are under voluntary control are part of the somatic PNSSomatic motor axons which command muscle contraction derive from motor neurons in the ventral spinal cordcell bodies of motor neurons lie in the CNS but their axons are mostly in PNS
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