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35 Cards in this Set
- Front
- Back
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3 major functions: 1. Conduits for ascending and descending tracts of the SC to different parts of the forebrain |
The brainstem |
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2. Contains important reflex centers associated with respiratory, cardiovascular function and consciousness |
The brainstem |
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Contains important nuclei of CN 3-12 |
The brainstem |
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Swellinh on each side of the median fissure; consists of bundles of nerve fibers called corticospinal fibers ORIGINATING FROM PRECENTRAL GYRUS OF THE CORTEX |
Pyramids |
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Decussation of the pyramid most descending fibers cross over except: it comes from anterior medial fissure passing laterally from the medulla to the cerebellum |
Anterior external arcuate fibers |
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Elevation produced by Inferior olivary nuclei (olivocerebellar fibers, related to motor "control") |
Olives |
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Emerges in the groove between the pyramids and the olive |
Hypoglossal nerve |
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Glossopharyngeal and vagus |
Emerges from the groove between the olive and inferior cerebellar peduncle |
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Floor of the 4th ventricle |
Posterior median fissure |
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Dorsal column path-via internal arcuate fibers |
Cuneate tubercle ( produced by cuneate nucleus) |
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Dorsal column path |
Gracile tubercle (swelling produced by the underlying gracile nucleus) |
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About 1 inch long; BRIDGE between the right and left cerebellar hemispheres |
PONS |
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Contains tracts or pathways that carry signals up to the thalamus |
PONS |
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Holds basilar artery |
Basilar groove |
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Posterior surface of the triangular PONS is symmetrically halves by |
MEDIAN SULCUS |
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Bluish gray color on the floor of the sulcus limitans. Bluish color because of deeply pigmented nerve cells |
Substantia ferruginnea |
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About 0.8 inch (2 cm) in length |
Midbrain |
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Associated with vision, hearing, motor control, sleep/wake, arousal (alertness), amd temperature regualation |
Midbrain |
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Deep depression containing small blood vessel, region is termed POSTERIOR PERFORATED SUBSTANCE |
Interpeduncular fossa |
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Emerges from a groove on each side |
Oculomotor nerve |
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Lies anterior on each side of the interpeduncular fossa (anterior portion of cerebral peduncle) |
Crus cerebri |
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Rounded eminences |
Corpora quadrigemina |
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Center for visual reflexes |
Superior colliculi |
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Auditory centers |
Inferior colliculi |
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Only CN emerging posteriorly |
Trochlear neve |
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Bands of fiber passing from superior colliculus to lateral genuculate body and optic tract |
Superior brachium |
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Inferior colliculus to medial geniculate body |
Inferior brachium |
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Dorsal part (colliculi; auditory and visual reflexes) |
Tectum of the midbrain |
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Ventral part (motor signal sending inhibitatory signals to the thalamus to control unwanted movements) |
Tegmentum of the midbrain |
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Color due to NEUROMELANIN |
Substantia nigra |
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Largest nucleus of the midbrain; important in eye movement, motor planning/control learning, reward seeking and adduction. |
Substantia nigra |
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MAJOR SOURCE OF GABAnergic inhibition. |
Substantia nigra |
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NIGRAL DEGENERATION related to PARKINSON'S DISEASE (rigidity, prpulsive gait, masked facies, tremors). Another example Huntington chorea |
Substantia nigra |
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Nerve fibers from front of the midbrain containing large motor and sensory tracts to and from cerebrum and from the pons. CONNECTION TO THE PONS AND TO THE LOWER CEREBRUM |
Cerebral peduncle |
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Stem-like |
Peduncle |
