Lecture 9 (2/19) Flashcards Preview

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Flashcards in Lecture 9 (2/19) Deck (15):
1

Cerebellum (Overview)

Lies dorsally to the pons and the medulla

Separated from the brainstem by the fourth ventricle

Connected to the brainstem through Cerebellar Peduncles

Entire surface made up of folia

2

Cerebellar Peduncles

Located on the pons

Connect the cerebellum to the brainstem

3

Folia

Tightly packed gyri that compose the entire surface of the cerebellum

4

Cerebellum (Function)

Contributes to the coordination of movement
Does NOT initiate movement

Modifies motor information from the cortex

Maintains equilibrium

Compares motor activities to increase precision and smoothness of movement

5

Cortical Motor Function

The modification of motor information coming from the cortex in the cerebellum

6

Damage to the Cerebellum

Effects:
Mild weakness
Tremors
Paucity of movement
Muscular incoordination
Impaired equilibrium

Problems are ipsilateral

7

Ataxia

Disorder caused by damage to the cerebellum

Incoordination of movement with an unsteady gate

Looks like a heavily intoxicated person

8

Dysdiadochokinesia

Disorder caused by damage to the cerebellum

Impaired ability to coordinate or perform sequences of movements, especially RAPID, ALTERNATING movements
Ex. "pataka"

9

Dysmetria

Disorder caused by damage to the cerebellum

Impaired ability to estimate or judge the range of voluntary movement

Patients fail to judge correctly the distance of a target from a point during motor behavior

10

Dyssyngeria

Disorder caused by damage to the cerebellum

Condition in which the patient exhibits jerky, uneven, and tremulous movements (ALL MOVEMENTS, GENERAL MOVEMENTS)
Ex. Asking the patient to touch his nose

11

Dysarthria

Disorder caused by damage to the cerebellum

Speech disorder marked by slow, slurred, and disjointed production of syllables

12

Intention Tremor

Disorder caused by damage to the cerebellum

The patient exhibits difficulty during the performance of tasks using skilled movement (SKILLED MOVEMENTS, INCREASES IN INTENSITY)

Tremor becomes more severe as the patient approaches the target
Ex. Pointing at one's nose

Disrupts timing of muscular excursion

13

Hypotonia

Disorder caused by damage to the cerebellum

A reduction of muscle tone and tension

The patient exhibits loss of muscle tone and therefore the muscle resists passive stretching

14

Rebounding

Disorder caused by damage to the cerebellum

Reduced ability to predict or stop a movement
"Keeps you from hitting your own face when your arm is released"

15

Disequilibrium

Disorder caused by damage to the cerebellum

Shows unsteadiness in their gait

The body tends to slide towards the side of the body that has experienced damage