Cerebellum- Mod 8 Flashcards
Where is the cerebellum located
- inferior to the occipital lobe
- posterior to brainstem
- tucked under the occipital lobe
- tentorium is the roof of the cerebellum
The cerebellum rests in the ______
Posterior cranial fossa
What are the roles of the cerebellum
- Grand coordinator of movement
2. Processing unconscious sensory input related to outgoing motor activity
What are the 3 major coordination aspects the cerebellum is responsible for
- Motor coordination
- Muscle tone
- Equilibrium/balance
What are the 3 cell layers of the cerebellum
- Molecular (outer)
- Purkinje
- Grandular (inner)
Which cerebellar cortex layer have excitatory cells. And what are they
Granular (inner)
Granule and golgi cells
What are the 4 pairs of deep nuclei in the white matter core
- Dentate
- Festival
- Globose
- Emboliform
What white matter core nuclei are considered to be interposed nucleus
Globose and emboliform
What are the 3 peducles that connect the cerebellum to the brainstem
- Superior peduncle
- Middle peduncle
- Inferior peduncle
T/F the superior peduncle connects the cerebellum to the pons
False; midbrain
T/F the cerebellum does not initiate movement
True
The cerebellum receives constant input regarding
- Joint position and muscle contraction and tone
- Body state of equilibrium
- Commands sent out from cerebral motor cortex
Damage to the cerebellum leads to
- Muscle weakness
2. Impaired coordination and balance
T/F: output pathways of the cerebellum are direct
false; indirect
The medial zone has an important role in
Movements of the axial body
What is the lateral zone involved with
- Coordination of sequential movements
- Motor sequences
- Learning motor sequences
The vermal zone is also known as
Median zone
The intermediate zone is concerned with
Control of muscle contractions in distal portions of upper and lower limbs
The horizontal subdivisions include
- Flocculonodular lobe (inferior)
- Anterior lobe (superior)
- Posterior lobe (middle)
What is the important role of the flocculonodular lobe
Regulation of muscle tone, posture and equilibrium, and control of eye movement
T/F the posterior lobe has an important role in motor coordination and voluntary muscle activity (planning and programming)
True
The longitudinal subdivision makes up the
Vermal zone
T/F the cerebellum input pathways from the cerebral cortex enter via the middle peduncle via the corticpontine pathway
True
The lateral zone includes the _____ as its output nucleus
Dendate
