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CU-Boulder NRSC 2100 - Mammalian Nervous System Anatomy

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Mammalian Nervous System AnatomyThe structure of the nervous system tells us about brain functionBrain organization: Mammalian planMain Nervous System divisions:CNS (central) and PNS (peripheral)Some jargon for neural projections of groups of neuronsTrack: group of axons traveling together in the central nervous system (CNS)Nerve:group of axons traveling together in the peripheral nervous system (PNS)Cerebral Spinal Fluid: produced by the choroid plexus, it cushions the brain and spinal cord against impactThe Central Nervous SystemCerebrum, cerebellum, brain stem (Brain)Spinal CordPeripheral Nervous SystemSomatic: Spinal nerves innervating the skin, joints, and muscles controlling voluntary movements.Autonomic: Spinal nerves innervating internal organs, blood vessels, and glands (unconsciously).Sensory: Carries sensory signals from skin, skeletal muscles (proprioception), joints, bones, and other sensory systems to central nervous system = afferents to CNSMotor: Carries motor information from the central nervous to skeletal muscles = efferents from CNSCranial Nerves: are also part of the somatic nervous system carries info from special senses: taste, smell, vision, hearing, and equilibrium, in addition to somatosensory and motor info.- axons enter and exit brain via “cranial nerves”.Autonomic Nervous SystemAll preganglionic neurons (Symp, Parasymp) use acetylcholine as neurotransmitterSymp. postganglionic neurons use noradrenaline;Parasymp. postganglionic neurons also use acetylcholineNRSC: 2100 1st Edition Lecture 13Mammalian Nervous System Anatomy– The structure of the nervous system tells us about brain function– Brain organization: Mammalian plan– Main Nervous System divisions:• CNS (central) and PNS (peripheral)Some jargon for neural projections of groups of neuronsTrack: group of axons traveling together in the central nervous system (CNS)Nerve:group of axons traveling together in the peripheral nervous system (PNS) Cerebral Spinal Fluid: produced by the choroid plexus, it cushions the brain and spinal cord against impactThe Central Nervous System– Cerebrum, cerebellum, brain stem (Brain)– Spinal CordPeripheral Nervous SystemSomatic: Spinal nerves innervating the skin, joints, and muscles controlling voluntary movements. Autonomic: Spinal nerves innervating internal organs, blood vessels, and glands (unconsciously).Sensory: Carries sensory signals from skin, skeletal muscles (proprioception), joints, bones, and other sensory systems to central nervous system = afferents to CNSMotor: Carries motor information from the central nervous to skeletal muscles = efferents from CNSThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Cranial Nerves: are also part of the somatic nervous system carries info from special senses: taste, smell, vision, hearing, and equilibrium, in addition to somatosensory and motor info. - axons enter and exit brain via “cranial nerves”.Autonomic Nervous SystemAll preganglionic neurons (Symp, Parasymp) use acetylcholine as neurotransmitterSymp. postganglionic neurons use noradrenaline;Parasymp. postganglionic neurons also use


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