Medulla oblongata
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What does the myelencephalon develop into?
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Medulla oblongata
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Aka myelencephalon. inferior portion of the brain stem that connects the spinal cord
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12 cranial nerves
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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
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3 parts of the diencephalon
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Epithalamus, thalamus, hypothalamus
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3 types of white matter fibers
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Association fibers, commissural fibers, projection fibers
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4 plexuses
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Cervical plexus, brachial plexus, lumbar plexus, sacral plexus
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6 major divisions of the brain
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Cerebrum, diencephalon, the pons, cerebellum, medulla oblongata
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Action potential
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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
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Afferent division
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Sends sensory information to the CNS via receptors
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Amygdaloid body
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Component of the limbic system
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Anterior group
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Part of the limbic system
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Anterior median fissure
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Wide crease in spinal cord
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Arachnoid
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Middle meningial layer (deep to dura mater). simple squamous epithelial
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Arachnoid granulations
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Fingerlike extensions of arachnoid which penetrates the dura mater that surround and suspend the blood vessels within the meninges
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Arachnoid of the brain
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Middle cranial meningial layer that acts as a roof over the cranial blood vessels
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Arbor vitae
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Connects cerebellar cortex with the cerebellar peduncles
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