12-9 Cerebellum Flashcards Preview

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Flashcards in 12-9 Cerebellum Deck (12)
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1
Q

A: Job of the Cerebellum?

B: After leaving from [Deep Cerebellar Nuclei], Cerebellar Efferents may travel to the ___, _____, _____ and ______

C: There is NO DIRECT connection from Cerebellum to __ ____

A

A: Coordinates & Corrects current movements to match those INTENDED

B: After leaving from [Deep Cerebellar Nuclei], Efferents travel to the Thalamus, [Red Nucleus of Midbrain], [Vestibular Nuclei complex] and [MLF of midbrain]

C: There is NO DIRECT connection from Cerebellum to Spinal Cord

2
Q

A: Name the 3 [Deep CEREBELLAR nuclei] and List the Cerebellar parts they RECEIVE info from

B: Which part of the Brainstem has a lot of β€œLumps and Bumps” on it?

A

A: Deep CEREBELLAR nuclei

  1. Fastigial (Receives from Flocculonodular lobe)
  2. Interposted (Receives from Vermis & Medial hemisphere)
  3. Dentate (Receives from LATERAL hemisphere)
    - β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”-B: MEDULLA
3
Q

A: What lobes does the [Primary Fissure] of the Cerebellum separates?

B: A: What lobes does the [HORIZONTAL Fissure] of the Cerebellum separates?

A

Cerebellum
A: Primary Fissure= Separates ANT cerebellar lobe from POST cerebellar lobe
————————————————————————————–
B: Horizontal Fissure = Separates UPPER and LOWER portion of Cerebellum

4
Q

A: [inferior Cerebellar Peduncle] (ICP) RECEIVES AFFERENT signals from what 3 things?

B: [inferior Cerebellar Peduncle] (ICP) SENDS these AFFERENT signals to the ___ & _____ ____

C: [inferior Cerebellar Peduncle] (ICP) EFFERENTS travel to the ___ nuclei

A

A: [inferior Cerebellar Peduncle] (ICP) RECEIVES AFFERENT signals from the…

  1. [Vestibular/Cochlear nuclei]
  2. Inferior olivary nucleus of (rostral medulla)
  3. Dorsal Spinocerebellar & cuneocerebellar tracts

B: [inferior Cerebellar Peduncle] (ICP) SENDS EFFERENT signals to the Vermis & Flocculonodular lobe

C: [inferior Cerebellar Peduncle] (ICP) EFFERENTS travel to the [Vestibular/Cochlear Nuclei]

5
Q

A: [Middle Cerebellar Peduncle] (MCP) RECEIVES AFFERENT signals from the _____ which travels to the ___nuclei first in order to get to the MCP

B: [Middle Cerebellar Peduncle] (MCP) SENDS these signals to the _______

A

A: [Middle Cerebellar Peduncle] (MCP) RECEIVES AFFERENT signals from the…
1. Cortexβ€”>Pontine nuclei–>MCP

B: [Middle Cerebellar Peduncle] (MCP) SENDS these signals to the HUGE Lateral Cerebellar hemispheres

6
Q

A: **[SUPERIOR Cerebellar Peduncle] (SCP) ONLY RECEIVES 1 AFFERENT signal from the______

B: The SCP are MOSTLY EFFERENTS that originate from ____ ___ _____ nuclei and travel to ___ and __ ____

A

A: [SUPERIOR Cerebellar Peduncle] (SCP) ONLY RECEIVES 1 AFFERENT signal from the [Ventral Spinocerebellar Tract]

B: The SCP are MOSTLY EFFERENTS that originate from [Dentate DEEP Cerebellar nuclei] and travel to Thalamus and Red Nucleus

7
Q

Once Afferent information gets to [Flocculonodular Lobe] from (___) , it’ll send signals to [_____ nucleus] —–>_____ & _______= coordinates eye movements with ________ movements

A

Once Afferent information gets to [Flocculonodular Lobe] from (ICP) , it’ll send signals to [Fastigial nucleus] —–>[Vestibular/Cochlear nuclei] &[MLF of midbrain] = coordinates eye movements with head & neck movements

8
Q

____ & ______ of the Cerebellum send information to the [Interposed Cerebellar nucleus], which sends fibers to the ______ and itβ€”(decusates)β€”->to form the ______ tract

A

Vermis & [Medial Cerebellum hemisphere] correspond with the [Interposed nucleus] (Glubose-emboliform) β€”->[Red Nucleus of midbrain prt 1] β€”(decusates)β€”->Rubrospinal tract

9
Q

[Lateral Cerebellum hemispheres] correspond with the ____ nucleus β€”-(to 2 structures)β€”>
1. _______ β€”->(decusates)β€”>projects down to _______–>
(uses ___ _____)β€”->____ ___ _____β€”> [__ ____ nuclei]

  1. …also goes to _____ β€”> CEREBRAL Cortex
A

[Lateral Cerebellum hemispheres] correspond with the Dentate nucleus β€”-(to 2 structures)β€”>

  1. [Red Nucleus of Midbrain prt 2] β€”->(decusates)β€”>projects down to [inf olivary nucleus]–>(climbing fibers)
    - β€”>[Inhibitory Purkinje Cells]β€”> [DEEP Cerebellar nuclei]
  2. also goes to Thalamus β€”> Cerebral Cortex
10
Q

Cerebellar ___ and ____ hemispheres are responsible for coordinating TRUNK Muscles
vs.
Cerebellar ____ hemispheres are responsible for LIMBS (Feet & hand) Muscles

A

Cerebellar Vermis and Medial hemispheres are responsible for coordinating AXIAL/TRUNK Muscles
vs.
Cerebellar Lateral hemispheres which are responsible for LIMBS (Feet & hand) Muscles

11
Q

Cerebellum is made of 3 Layers:

  1. [Outer Molecular layer] is mainly __ & ____. It has ___ cells (?) and ____ cells (?)
  2. Describe the [Purkinje layer]
  3. Describe the [inner Granular Layer]
A

Cerebellum is made of 3 Layers:
1. [Outer Molecular layer] which is mainly Axons & Dendrites. It has Basket cells (axons synapsing on Purkinje Bodies) and Stellate cells (axons synapsing on Purkinje Dendrites)

  1. Purkinje layer = AXON leaving cerebellum
    - β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”β€”-
  2. [inner Granular Layer] = has white mater underneath
12
Q

A: What are Mossy Fibers?

B: What is their route of Passage
Mossy Fibersβ€”> ______Cell —–> ______ ____
β€”->LIGHTLY innervate ____ ___ ____—–> ____ ___ _____

A

A: Mossy Fibers = Any Cerebellar fiber NOT FROM [inf olivary nucleus] that travels to Cerebellar [Inhibitory Purkinje cells]

B: Mossy Fibersβ€”>Granule Cellβ€”(bifurcates)β€”>Parallel fibers –>LIGHTLY innervate many [Inhibitory Purkinje cells]
β€”-> [Deep Cerebellar Nuclei]