Cerebellum & Dermatomes Flashcards
What type of cells are found in the Molecular layer of the cerebellum?
Stellate cells and Basket cells
What type of neurons are Purkinje cells?
Golgi Type 1 Neurons
The context of the vermis influences movements along which parts of the body?
Neck
Shoulder
Hips
Thorax
Abdomen
What is the name of the area found laterally to the vermis?
Paravermal area or Intermediate Area.
What is the function of the Intermediate area of the Cerebellum?
It controls the muscles of the distal parts of the limbs especially hands and feet.
What is the function of the lateral zone of each cerebellar hemisphere?
They are concerned with the planning of sequential movements of the entire body and is involved with the conscious assessment of movement errors.
Which nuclei is the largest cerebellar nucleus?
Dentate Nucleus
What are the four nuclei that are apart of the Intercerebellar nuclei?
Don’t - Dentate nucleus
Eat- Emboliform nucleus
Greasy - Globose nucleus
Food - Fastigial nucleus
What are the three groups of white matter located in the Vermis of the Cerebellum ?
Intrinsic
Afferent
Efferent
What are the 5 types of Intrinsic neurons located in the Cerebellar cortex?
Pukinje cells
Stellate cells
Golgi cellls
Basket cells
Granular cells
Which type of nuerons in the Cerebellar cortex are strictly EXCITATORY?
Granular cells ( All others are Inhibitory )
What are the main constituents of the Archicerebellum ( Vestibular cerebellum)?
The Flocculonodular lobe and Lingula.
What are the main constituents of the Paleocerebellum ( Spinal cerebellum)?
It consists of Anterior lobe (except lingula) and pyramid, and the uvula of inferior vermis.
Fill in the blanks . “The Neocerebellum ( Cerebral cerebellum ) consists of _________. “
The Middle lobe, the largest part of the cerebellum (except the pyramid and the uvula of inferior vermis).
What is the main function of the Archicerebellum ( Vestibular cerebellum)?
The archicerebellum is chiefly vestibular in connections and concerned with the maintenance of equilibrium, tone, and posture of trunk muscles.
What is the main function of the Paleocerebellum( Spinal cerebellum) ?
The paleocerebellum is chiefly spinocerebellar in connections and is concerned with the tone, posture, and crude movements of the limbs.
What is the main function of the Neocerebellum ( Cerebral cerebellum ) ?
The neocerebellum is chiefly corticopontocerebellar in connections and is concerned with the smooth performance of skilled voluntary movements.
Fill in the blanks . “ The globose nucleus and the emboli form nucleus together are referred to as ____________.”
Nucleus interpositus.
The Cerebellum receives Information about the skin and Superficial fascia through which tract?
The Anterior Spinocerebellar tract
Where is the Inferior Cerebellar Peduncle formed?
It is formed on the posterolateral aspect of the upper half of the medulla oblongata.
True or False? Efferent fibres from the Dentate , Emboliform and Globose nuclei leave the cerebellum through the inferior cerebellar peduncle.
FALSE!! They leave the cerebellum though the Superior Cerebellar peduncles
Fill in the blanks. “Fibres from the fastigial nucleus leave the through the ____________.”
Inferior cerebellar peduncles
Which tract is known as the Double crosser?
The Anterior Spinocerebelllar tract
What is the most common cause of Vermis syndrome?
Medulloblastoma
Which nucleus of the Thalamus receives neuronal input from Cerebellum?
The Ventral Lateral nucleus
Where does the Ventral anterior thalamus receives its input from?
Basal Ganglia
Where does the deep cerebellar nucleus receives its afferents from?
+ Inhibitory axons from Purkinje cells
+ Excitatory axons that are branches of afferent climbing and mossy
fibers passing to cortex
What substance are used by Purkinje cells?
GABA
What substance are used by the Climbing and mossy fibres?
Glutamate
Which nucleus is the Inferiorly displaced Pontine nuclei?
Arcuate nucleus
What are the three functional areas of the Cerebellum?
+ Cortex of vermis influences movements of long axis of body (neck, shoulders, thorax, abdomen, hips)
+ Intermediate zone (lateral to vermis): control muscles of distal parts of limbs (especially hands and feet)
+ Lateral zone of each cerebellar hemisphere: planning of sequential movements of entire body and conscious assessment of movement errors.
What are the three different groups of White matter fibres found in the Cerebellum?
- Intrinsic Fibres
- Afferent Fibres
- Efferent Fibres
Which fibres of the cerebellum do not leave cerebellum but connect different areas of it
(e.g., connection of 2 cerebellar hemispheres together, or vermis with cerebellar cortex on same side) ?
Intrinsic fibres
Fill in the blanks. “ Afferent fibres enter the cerebellum through _________ &___________.”
Middle & Inferior peduncles
Fibres from which deep nuclei leave through the Inferior cerebellar peduncle?
Fastigial nucleus
Fibres from the dentate , globose & emboli form nuclei leave through ?
Superior peduncle
Where does the Deep Cerebellar nuclei receive afferent information from?
- Inhibitory axons from Purkinje cells.
- Excitatory axons that are branches of afferent climbing and mossy fibers passing to cortex.
True or False? All afferent fibers from inner ear terminate as mossy fibers in flocculonodular
lobe of cerebellum .
TRUE!!
