CEREBELLUM Flashcards Preview

ANATOMY KAPLAN FOR THE USMLE > CEREBELLUM > Flashcards

Flashcards in CEREBELLUM Deck (13):
1

VESTIBULOCEREBELLUM

Or also called:

function

nucleous

Efferents

  • Floculonodular lobe
  • Make changes in the eyes and trunk in response to movement of the head
  • Efferents to: vestibular nucleus
  • Synapse fastigial nucleuos (Deep cerebellar)

2

The lobe of the cerebellum in charge off influencing LMN via thecorticospinal tract fro volluntary movements with sequence and precison is __________ which by eferent synapse in ________

Pontocerebellum or Lateral hemispheres

Before entering the cortex synapse in the:

  • Ventrolateral
  • ventro anterior

nucleus of the thalamus

3

THE INTERMEDIATE HEMISPHERE MODULATE LMN BY USING _______;________ TRACTS

  • Reticulospinal
  • Rubrospinal

4

The layers of the cortex pf the cerebellum are composed of ?

  1. Molecular layer
  2. Purkinje layer
  3. Granule cell layer

5

Fibers that enter the cerebellum most commonly use _______,________ and fibers that exit the cerebellum most commonly exit through _______.

Enter: ICP,MCP

Exit: SCP

6

TOPOGRAPHIC ARRAGEMENT THE CEREBELLUM

Vermis: Axial and proximal trunk musculature

Interhemipshere: Distal musculature

Latral hemisphere: Coordination and planning

Flocculonodular: balance and eye movements

7

Principal inputs for the cerebellum lobes

Vermis-intermediate lobe:

Lateral hemisphere:

Flocculonodular lobe:

Vermis-intermediate lobes: spinal cord

Lateral: cerebral cortex, inferior olivary nucleus

Flocculonodular: vestibular nuclei

8

Which type of fibers enter to the cerebellum ?

 

Mossy fibers(active granule)

Climbing fibers(active purkinje directly) (olive)

9

Purkinje cells are _______ and use ________, while granule cells are ______ and use _________.

Purkinje are inhibitory using GABA

Granule cells are excitatory using glutamate

10

A patient with ataxic gait and history of chronic alcoholic abuse most commonly has ?

A lesion in the anterior vermis

11

Posterior vermis is commonly lesioned by ?

Meduloblastomas

Ependymomas

12

Which signs suggest us of a cerebellum hemisphere lesion ?

  • Dysmetria
  • Intension tremor
  • Dysdiadochokinesia
  • Hypotonia
  • Gaze dysfunction
  • Scanning Dysarthria

13

How we differentiate a pacient who has suffered a lesion at the dorsal columns from one that suffered a lesion at the cerebellum ?

Dorsal column lesion produce:

Romberg sign ( patient sway with eyes closed)

Sensory ataxia

Cerebellum lesion (vermis):

Gait ataxia

Patient sway with eyes open