02 - Brain Organization and Nervous system

02 - Brain Organization and Nervous system -...

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How Does the Nervous System  How Does the Nervous System  Function? Function?    
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Lecture Overview Lecture Overview Overview of Brain Function and Structure Overview of Brain Function and Structure of the Nervous System of the Nervous System Principles of Nervous System Function Principles of Nervous System Function
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Terminology Terminology Neuraxis: imaginary line drawn through the  Neuraxis: imaginary line drawn through the  spinal cord up to the front of the brain spinal cord up to the front of the brain Anatomical directions are understood relative  Anatomical directions are understood relative  to the neuraxis to the neuraxis Rostral  Rostral  (anterior)- toward the head (anterior)- toward the head Caudal Caudal  (posterior)- toward the tail  (posterior)- toward the tail Dorsal Dorsal  (superior) – toward the belly  (superior) – toward the belly Ventral Ventral  (inferior) – toward the back  (inferior) – toward the back Location in brain: Location in brain: Medial Medial Lateral Lateral
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          Summary Summary
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The brain’s surface features The brain’s surface features Lateral View
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Internal organization Internal organization Medial View
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The surface features of the  brain
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The Meninges The Meninges A series of membranes  that protect the  A series of membranes  that protect the  brain and spinal cord brain and spinal cord
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The Meninges Dura mater - Latin for “hard mother” thick,  tough outer layer of tissue  Arachnoid - Greek “like a spider’s web”  middle layer, thin sheet of delicate  connective tissue Overlies the subarachnoid space (CSF) and  acts like a cushion Pia mater - Latin “soft/tender mother” inner  layer clings to the brain’s surface Overlies contours of brain; its capillaries nourish  the brain
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Cerebrospinal fluid (CSF) Cerebrospinal fluid (CSF) Fluid that cushions brain and  spinal cord in subarachnoid  space btw arachnoid layer  and pia mater Made of NaCl and Made of NaCl and     other salts  other salts  Meningitis- Inflammation and  or infection of the meninges  and CSF due to virus or  bacteria Life threatening b/c of proximity  to brain/spinal cord
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Cerebrum Hemispheres The uppermost portion of the  brain  2 symmetrical halves of  brain: Control opposite side of  body  Left brain controls right  body Right brain controls left  body Rostral Caudal Ipsilateral : same side of brain Contralateral : opposite side of brain
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Cerebrum Cerebrum The large top of the brain outer cap of gray  matter,  heavily folded outer ½ inch  heavily folded outer ½ inch 
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02 - Brain Organization and Nervous system -...

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