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26 Cards in this Set
- Front
- Back
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the brainstem is a that connects |
Short extension of the brain the Diencephalon to spinal cord |
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the brainstem contains what 3 types of structures |
cranial nerve nuclei longitudinal fiber tracts reticular formation |
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brainstem: longitudinal fiber tracts are |
vertical pathways – mylenated interconnections |
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brainstem: Reticular formation is made up of |
specialized nerve cells interconnected to nuclei in the thalamus and spinal cord |
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brainstem: major structures (4) |
RAS Midbrain Pons Medulla |
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Midbrain Pons Medulla oblongata come from the |
mesencephalon metencephalon myelencephalon |
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RAS stands for |
reticular activating system |
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RAS fxns (3) AMC |
Arousal/alertness/awake Metabolic repair Consciousness |
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RAS located in |
dorsal part of brainstem |
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Midbrain components |
Cerebral peduncle (4) |
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cerebral peduncle components (4) collectively these fxn as |
1) Corticospinal tract (2) Corticobulbar tract (3) Corticopontine tract (4) Superior/Inferior colliculi massive ascending & descending fiber tracts |
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Corticospinal tract, middle 3/5: originates at? goes to? ascending or descending? sensory or motor? |
cortex
spinal cord descending motor |
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Corticobulbar tract: originates at?goes to? ascending or descending? sensory or motor? |
cortex brainstem descending motor |
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Corticopontine tract: originates at?goes to? ascending or descending? sensory or motor? |
cortex pons descending motor |
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Superior colliculi – location and fxn |
superior end of midbrain (superior to Inferior colliculi) relay station: visual reflexes |
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Inferior colliculi – location and fxn |
superior end of midbrain (Inferior to superior colliculi) relay station: auditory reflexes |
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Pons location |
Bulging appearance on the middle part of the ventral surface of the brainstem between midbrain and medulla |
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pons fxn |
Contains descending motor fibers and ascending sensory fibers |
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medulla location medulla connects.... |
caudal (most inferior) portion of brainstem below pons brain stem to spinal cord |
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medulla fxns (3) |
Cardiac Vasomotor (regulation of blood vessels) Respiratory
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pyramids/pyramidal fibers are |
fiber tracts for motor function |
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the pyramidal decussation is where which happens at the? |
the fibers cross over caudal end of medulla |
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the foramen magnum is where is it? |
the demarcation between brainstem and spinal cord caudal end of medulla |
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midbrain location |
rostral end of brainstem above pons |
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what is the foramen magnum |
the hole in the base of the skull through which the spinal cord passes. |
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medulla components (3) |
Pyramids Pyramidal decussation Foramen magnum |
