The Nervous System

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File Name

Neurology

14th February 2009

Tara Singh

USA

224

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Sample of contents

 

Medulla oblongata

What does the myelencephalon develop into?

Medulla oblongata

Aka myelencephalon. inferior portion of the brain stem that connects the spinal cord

12 cranial nerves

I olfactory II optic III oculomotor IV trochlear V trigeminal VI abducens VII facial VIII vestibulocochlear IX glossopharyngeal X vagus XI accessory nerve XII hypoglossal nerve

3 parts of the diencephalon

Epithalamus, thalamus, hypothalamus

3 types of white matter fibers

Association fibers, commissural fibers, projection fibers

4 plexuses

Cervical plexus, brachial plexus, lumbar plexus, sacral plexus

6 major divisions of the brain

Cerebrum, diencephalon, the pons, cerebellum, medulla oblongata

Action potential

Electrical impulse that develops after the membrane is stimulated to a level known as threshold, a point at which membrane is permeable to sodium and potassium ions

Afferent division

Sends sensory information to the CNS via receptors

Amygdaloid body

Component of the limbic system

Anterior group

Part of the limbic system

Anterior median fissure

Wide crease in spinal cord

Arachnoid

Middle meningial layer (deep to dura mater). simple squamous epithelial

Arachnoid granulations

Fingerlike extensions of arachnoid which penetrates the dura mater that surround and suspend the blood vessels within the meninges

Arachnoid of the brain

Middle cranial meningial layer that acts as a roof over the cranial blood vessels

Arbor vitae

Connects cerebellar cortex with the cerebellar peduncles