9-2 Flashcards
1
Q
what does our cerebellum compare
A
- receives afferent (sensory) and efferent (motor)
- compares intention vs what happened
2
Q
function of cerebellum
A
-Maintenance of balance and posture
-Coordination of voluntary movements
-Motor learning
3
Q
Maintenance of balance and posture
A
- Important for making postural adjustments
- Integrates sensory information relevant to balance & modulates information
sent to motor neurons to control postural muscles
4
Q
Coordination of voluntary movements
A
- Coordinates timing and force of different muscle groups to plan and produce
smooth movements
5
Q
Motor learning
A
- Adapt and fine-tune motor commands to make accurate movement
- Trial-and-error process
6
Q
4 symmetrical sections
A
- Hemisphere
- Vermis
- Intermediate zone
- Flocculonodular lobe
7
Q
Spinocerebellar
A
- Location: vermis & intermediate zones
- Integrates sensory & motor information
- Motor coordination
8
Q
Cerebrocerebellar
A
- Location: lateral hemisphere
- Involves cortical input
- Planning and timing of movements
9
Q
Vestibulocerebellar
A
- Location: flocculonodular lobe
- Involves vestibular nuclei input
- Posture and vestibular reflexes
10
Q
Cerebellum is important for
A
- planning smooth, coordinated movements (spinocerebellar
and cerebrocerebellar pathways) - balance control (vestibulocerebellar pathway)
11
Q
ataxis
A
- Lack of coordination
- Decomposition of movement
- Jerky movement
12
Q
Dysmetria
A
- Inability to make accurate
voluntary movements - Overshoot/undershoot of
movement
13
Q
Hypotonia
A
Decrease in muscle
tone/resistance
14
Q
Large amounts of sway
A
15
Q
Efference
A
motor command sent from motor cortex to body
