Neuroscience FINAL EXAM - USA
Study online at https://quizlet.com/_fg1drf
CHAPTER 15 - THE CEREBELLUM - 7 QS
-Synergy of Movement
The Cerebellum 3 Major functions: -Upright Posture
- Tone (maintain)
Cerebellum exerts influence to motor systems of which 2
Cortex & Brainstem
areas to correct movement
-Lateral Part
Cerebellum 3 Functional Regions -Intermediate Part
-Vermis and Flocculonodular lobe
Cerebellum - Lateral Part fxn Motor Planning
Cerebellum - Intermediate Part fxn Distal Limb Coordination
Proximal Limb Coordination, Balance and Vestibulo-occu-
Vermis and Flocculonodular lobe fcn's (3)
lar reflexes.
Don't Eat Greasy foods
-Dentate - input from lateral regions
***Deep Cerebellar Nuclei (4) -Emboliform - input from intermediate regions
-Globase - input from intermediate regions
-Fastigal - input from medial (vermis) regions
-Mossy fibers (excitatory)
***Input to cerebellar cortex (2) ...hint: fibers -Climbing fibers (excitatory)
(Both synapse directly or indirectly onto Purkinje cells)
***Output from cerebellar cortex (name?) and (+ or -) -Purkinje axons (inhibitory)
***Lesions to the intermediate cerebellum would affect
Extremity coordination (appendicular ataxia)
what?
***Lesions to the medial cerebellum would affect what? Trunk control, posture, balance, unsteady gait, and **eye
(3) movements
, Neuroscience FINAL EXAM - USA
Study online at https://quizlet.com/_fg1drf
***All outputs of the cerebellum go through what struc-
Deep cerebellar nuclei and vestibular nuclei
tures? (hint: 2 different nuclei)
• Pathways from the cerebellum to the lateral motor sys-
tems and periphery are "doubled crossed"
(B) Output form intermediate cerebellar hemisphere via
• Why do deficits in coordination occur ipsilateral to the
interposed nuclei
lesion?
• 1st crossing- exits at superior cerebellar peduncle and
crosses
- Crossings?
• 2nd Crossing- pyramidal Decussation and ventral
tegmental Decussation (then influence musculature via
corticospinal and Rubrospinal tracts, respectively)
-vertigo
-nausea & vomiting
-horizontal nystagmus
-slurred speech
What are the S/S of cerebellar disorders? (8)
-Limb ataxia
-truncal ataxia
-unsteady gait
-HA on side of lesion
**1). Posterior inferior cerebellar artery (PICA) -
**2). Superior cerebellar artery (SCA) - involves most of
cerebellum, but spares lateral BS.
****Cerebellar Artery Infarcts / Most common Artery
•Anterior inferior cerebellar artery (AICA) - suplies internal
auditory artery
("lack of order")- disordered contractions of agonist and
Ataxia antagonist muscles and lack of normal coordination be-
tween movements at different joints
Truncal Ataxia (results from?) ... looks like
Study online at https://quizlet.com/_fg1drf
CHAPTER 15 - THE CEREBELLUM - 7 QS
-Synergy of Movement
The Cerebellum 3 Major functions: -Upright Posture
- Tone (maintain)
Cerebellum exerts influence to motor systems of which 2
Cortex & Brainstem
areas to correct movement
-Lateral Part
Cerebellum 3 Functional Regions -Intermediate Part
-Vermis and Flocculonodular lobe
Cerebellum - Lateral Part fxn Motor Planning
Cerebellum - Intermediate Part fxn Distal Limb Coordination
Proximal Limb Coordination, Balance and Vestibulo-occu-
Vermis and Flocculonodular lobe fcn's (3)
lar reflexes.
Don't Eat Greasy foods
-Dentate - input from lateral regions
***Deep Cerebellar Nuclei (4) -Emboliform - input from intermediate regions
-Globase - input from intermediate regions
-Fastigal - input from medial (vermis) regions
-Mossy fibers (excitatory)
***Input to cerebellar cortex (2) ...hint: fibers -Climbing fibers (excitatory)
(Both synapse directly or indirectly onto Purkinje cells)
***Output from cerebellar cortex (name?) and (+ or -) -Purkinje axons (inhibitory)
***Lesions to the intermediate cerebellum would affect
Extremity coordination (appendicular ataxia)
what?
***Lesions to the medial cerebellum would affect what? Trunk control, posture, balance, unsteady gait, and **eye
(3) movements
, Neuroscience FINAL EXAM - USA
Study online at https://quizlet.com/_fg1drf
***All outputs of the cerebellum go through what struc-
Deep cerebellar nuclei and vestibular nuclei
tures? (hint: 2 different nuclei)
• Pathways from the cerebellum to the lateral motor sys-
tems and periphery are "doubled crossed"
(B) Output form intermediate cerebellar hemisphere via
• Why do deficits in coordination occur ipsilateral to the
interposed nuclei
lesion?
• 1st crossing- exits at superior cerebellar peduncle and
crosses
- Crossings?
• 2nd Crossing- pyramidal Decussation and ventral
tegmental Decussation (then influence musculature via
corticospinal and Rubrospinal tracts, respectively)
-vertigo
-nausea & vomiting
-horizontal nystagmus
-slurred speech
What are the S/S of cerebellar disorders? (8)
-Limb ataxia
-truncal ataxia
-unsteady gait
-HA on side of lesion
**1). Posterior inferior cerebellar artery (PICA) -
**2). Superior cerebellar artery (SCA) - involves most of
cerebellum, but spares lateral BS.
****Cerebellar Artery Infarcts / Most common Artery
•Anterior inferior cerebellar artery (AICA) - suplies internal
auditory artery
("lack of order")- disordered contractions of agonist and
Ataxia antagonist muscles and lack of normal coordination be-
tween movements at different joints
Truncal Ataxia (results from?) ... looks like
