The Brain

Key component of the Central Nervous System = CNS

Regulates body functions, control, senses, thought, communication, survival

Cerebrum

Cerebellum

Brain Stem

Central NervousSystem

Peripheral Nervous

System

SPINAL CORDExtension of the CNSBegins at the base of the

skullTransmits informationNerves branch out

Cranial nerves extend from the brain

Spinal nerves extend from the spinal cord

PERIPHERAL NERVOUS SYSTEM

Bundles of nerves extending from the brain and the spinal column

Cranial Nerves1

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1. OLFACTORY2. OPTIC3. OCULOMOTOR4. TROCHLEAR5. TRIGEMINAL6. ABDUCENS7. FACIAL8. VESTIBULOCOCHLEAR9. GLOSSOPHARYNGEAL10. VAGUS11. ACCESSORY12. HYPOGLOSSAL

BLUE = SENSORYWHITE= MOTOR

Basic Brain AnatomyCEREBRUMCEREBELLUMBRAIN STEM

–Diencephalon–Midbrain–Pons–Medulla Oblongata

CEREBRAL HEMISPHERES

Right and Left

4 Cerebral Lobes

FRONTALPARIETALTEMPORAL OCCIPITAL

Speech & Motor Skills

SensoryAuditoryVisual

Bra

in

Pro

tect

ion

Cerebrospinal FluidCSFSHOCK ABSORBINGCLEAR AND COLORLESSSUPPORTS SPINAL CORD

Meneges

3 Coverings of the BrainHelp to Protect it

–Envelop itFibrous Tissue

Dura MaterOUTERMOSTTHICKEST

ArachnoidSPIDER-WEBLINES INNER SURFACE

OF DURA MATERVERY THIN

Pia MaterBELOW ARACHNOIDINNERMOST

COVERING OF BRAIN AND SPINAL CORD

Subarachnoid SpaceBETWEEN ARACHNOID AND PIA MATER

Filled with CSF