Session 31.  Recognize the major divisions of the nervous system  Describe how the CNS controls sensation, musculature, and other body systems  Describe.

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Presentation transcript:

Session 31

 Recognize the major divisions of the nervous system  Describe how the CNS controls sensation, musculature, and other body systems  Describe how the brain is protected by meninges  Explain how blood flows into and out of the skull  Describe CSF: what it is, how it is produced, how it is reintegrated

Affect all structures: muscles, blood vessels, organs, etc Functional Divisions: involuntary vs voluntary NS can be divided by anatomical relationships, or Functional purposes Nervous SystemAutonomicParasympatheticSympatheticSomatic

A. Skin sensory info B. Joint position info C. Voluntary motor control D. Involuntary motor control

 Anatomical divisions:  Central NS  Peripheral NS  Somatic and Autonomic systems only overlap in the PNS (one nerve contains both) in the Cranial Nerves!

A. Contain only autonomic info B. Contain only somatic info C. Contain both autonomic and somatic info D. Are in the CNS

A. True B. False

A. The spinal cord in the cervical region B. The spinal cord in any region C. The spinal nerves in the cervical region D. The spinal nerves in any region

 Recognize the major divisions of the nervous system  Describe how the CNS controls sensation, musculature, and other body systems  Describe how the brain is protected by meninges  Explain how blood flows into and out of the skull  Describe CSF: what it is, how it is produced, how it is reintegrated

Internal Carotid and Vertebral Arteries Ventricles (CSF) Choroid Plexus Sinuses Brain Tissue (Capillaries, BBB) Internal Jugular Vein

 Filtered by choroid plexus  Fills ventricles and SAS  fluid protection, hydration, buoyancy  Removes toxins and waste products of metabolism  Drains back into blood through sinuses

 Study recently measured speed of CSF flow during waking and sleeping hours in mice  CSF flow increases dramatically during sleep, while size of brain cells decrease subtly  Hypothesis is that sleep is necessary to flush the brain of toxic buildup that occurs during the day

A. Arteries B. Veins C. CSF D. Nerves

A. She has excess waste products in her brain B. Her NS suffers – and this affects thought processes, motor control, and autonomic functions C. She may believe she is functioning normally D. None of these are false

 Recognize the major divisions of the nervous system  Describe how the CNS controls sensation, musculature, and other body systems  Describe how the brain is protected by meninges  Explain how blood flows into and out of the skull  Describe CSF: what it is, how it is produced, how it is reintegrated