Cerebellum and Motor

Question 1

Superior Cerebellar Peduncle (input/output)

Answer 1

OUTPUT to the Midbrain

Question 2

Middle Cerebellar Peduncle (input/output)

Answer 2

INPUT from CL Cerebral Cortex

Question 3

Inferior Cerebellar Peduncle (input/output)

Answer 3

INPUT from IPS body

Question 4

Flocculonodular Lobe (FXN)

Answer 4

Balance and gait

Question 5

Which nucleus of the thalamus receives input from the Cerebellum?

Answer 5

VL (ventrolateral)

Question 6

Injury to Cerebellum

Answer 6

Awkwardness of INTENTIONAL movements: 
Ataxia
Asthenia
Tremor
Nystagmus

Question 7

Injury to Basal Ganglia

Answer 7

Meaningless, unintentional/unexpected movements:
Parkinsonism
Chorea
Athetosis
Hemiballismus

Question 8

Ataxia

Answer 8

Awkwardness of posture and gait
Poor coordination of movement
Finger nose test fail
Irregular spaced sounds

Question 9

Asthenia

Answer 9

Muscles tire more easily than normal

Question 10

Cerebellar Tremor

Answer 10

Tremors during purposeful movements

Question 11

Parkinsonism

Answer 11

Degeneration of basal ganglia/substantia nigra

Rigidity
Slowness
Resting Tremor
Mask-like faces
Shuffling gate

Question 12

Chorea

Answer 12

Sudden jerky and purposeless movements (e.g, Huntington’s)

Question 13

Athetosis

Answer 13

slow-writhing snake like movements; especially of the fingers and wrist

Question 14

Hemiballismus

Answer 14

sudden wild flail of one arm

Question 15

Extensor Posture

Answer 15

Reticulospinal

Vestibulospinal

Question 16

Flexor Posture

Answer 16

Rubrospinal

corticospinal

Question 17

Decerebrate Posture

Answer 17

Bernie; Extensors
Below the red nucleus (Lesion)
CereBellum (Lesion)
Reticulospinal? & Vestibulospinal?

Question 18

Decorticate posture

Answer 18

Mummy (Flexor)
Rubrospinal tract
Lateral Corticospinal tract
Above red nucleus (lesion)
Cerebral cortex, internal capsule, thalamus lesion

Question 19

Red Nucleus

Answer 19

motor coordination
Input: CL cerebellum () & Ips Motor cortex (corticorubro)
Output: Cerebellum path: Medial Tegmentum–> inf olivary n & Rubrospinal path (CL Reticular formation in spinal cord)

Question 20

Deep Cerebellar Nuclei

Answer 20

GABAergic (inhibition) from Purkinje cells
Glutametergic (excitation) from various pathways
Dentate, Interposed; Fastigii (Lat–>med)

Question 21

Rubrospinal tract

Answer 21

Flexion; primary motor cortex– corticorubral projection (in Cerebral peduncle)–> Synapse in Red nucleus (midbrain)–Rubrospinal tract (decussates in midbrain) (travels with corticospinal tract)–>synapse in ventral horn–> muscles

Question 22

Vestibulospinal tract

Answer 22

extensors; Lateral vestibular nucleus–> reticular formation (rostral medulla)–> spinal cord