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Neuroanatomy
Clinical Neuroanatomy
13
Medical
Undergraduate 1
03/17/2007

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Term
Paleocerebellum
Definition
The paleocerebellum controls proprioception related to muscle tone (constant, partial muscle contraction that is important for the maintenance of posture). The paleocerebellum receives its inputs from the dorsal and ventral spinocerebellar tracts, which carry information about the position and forces acting on the legs. The paleocerebellum then sends axonal projections to the deep cerebellar nuclei.
Term
Neocerebellum
Definition
The neocerebellum receives input from the pontocerebellar tract and projects to the deep cerebellar nuclei. The pontocerebellar tract originates at the pontine nuclei, which receive their input from the cerebral motor cortex. Thus, the neocerebellum is associated with motor control, in particular, the coordination of fine finger movements such as those required by typing. Whereas the other parts of the cerebellum function in the manner of feedback correction of motor activity, the neocerebellum is ideally arranged to work also in a feed-forward manner. It operates in conjunction with the cortical motor centres to plan movement which is just about to occur, presumably drawing on motor memory either within itself or within the cerebral cortex[3].
Term
Vermis
Definition
The vermis receives its inputs mainly from the spinocerebellar tracts from the trunk of the body. These tracts carry to the vermis information on the position and balance of the torso. The vermis sends projections to the fastigial nucleus of the cerebellum, which then sends output to the vestibular nuclei. The vestibular nuclei are structures important for the maintenance of balance.
Term
deep cerebellar nuclei
Definition
Don't Eat Greasy Food

Dentate, emboliform, globose, fastigial
Term
Cerebrocortical layers
Definition
From outer to inner layer, these are the molecular, Purkinje, and granular layers.
Term
Cerebellar blood supply
Definition
Superior cerebellar artery (SCA. Anterior inferior cerebellar artery (AICA),
Posterior inferior cerebellar artery (PICA).
Term
Presentation of Archicerebellar deficit
Definition
1) Ataxia

2) Wide-based standing position

3) Nystagmus
Term
Presentation of Paleocerebellar deficit
Definition
Hypotonia
Term
Neocerebellar deficit presentation
Definition
1) Delayed initiation & termination of movement
2) Intention tremor
3) Dysdiadochokinesia
Term
Dysdiadochokinesia
Definition
Inability to perform quick, repetitive movements.
Term
Papilledema
Definition
Swelling of the optic nerve due to increased intracranial pressure
Term
Superior Colliculi
Definition
Centers for visual reflexes
Term
Inferior Colliculi
Definition
Lower auditory centers
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