NERVOUS 101

Kayla King

Lauren Mills

Importance

• Sends messages throughout the body.– 5 senses

Components

• Central – Brain– Spinal cord

• Peripheral– Somatic– Autonomic

• Parasympathetic• Sympathetic

Anatomyphysiology

• Brain is divided into diff. Sections– cerebral hemispheres

• Frontal

• Temporal

• Parietal

• occipital

– Diencephalon

– Midbrain

– Pons

– Medulla Oblongata

– Cerebellum

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CENTRAL• Consist

– Spinal cord– Brain– White matter

• axons

– Grey matter• cell bodies• Branched dendrites

Central nervous system

Peripheral NS

• Consists– Sensory nerves

• Sends info to spinal cord and brain

– Motor nerves• Carries messages from sc and b to other body parts

• Subdivided– Sensory-somatic NS– Autonomic NS

Peripheral

Sensory-Somatic NS

• Consists of– Sensory division (afferent division)

• Receives signals from nerves and tissues• Sends to cranial and spinal nerves

– Motor division (efferent div.)• Contains pathways from spinal cord and brain stem to

lower neurons in spinal and cranial nerves

Sensory-Somatic Nerves

• 12 pairs of cranial nerves• 31 pairs of spinal nerves

SOMATIC

Ans

• Consists of – sensory neurons and motor

neurons that are in the CNS and organs

– Two subdivisions• sympathetic nervous system • parasympathetic nervous

system

• Involuntary actions• Uses two groups of motor

neurons– preganglionic neurons– postganglionic neurons

AUTONOMIC

Sympathetic

• Involuntary• For Stress• http://www.bbc.co.uk/

science/humanbody/body/index_interactivebody.shtml

Parasympathetic

• Involuntary• For Rest• http://www.bbc.co.uk/science/

humanbody/body/index_interactivebody.shtml

Diseases/disorders

• Alzheimer disease

• Huntington disease

• Multiple sclerosis

• Parkinson disease

• Wallenberg syndrome

• Wilson disease

Effects of drugs/alcohol

Alcohol

Caffeine

Works cited

• http://www.uclan.ac.uk/ldu/resources/multimedia/visualization/visualization-animations.htm

• http://science.nhmccd.edu/BioL/ap1int.htm#brain

http://casweb.cas.ou.edu/pbell/Histology/Outline/nerve.html