Cerebellum!

Blood & Guts

100

Supplies ICP, inferior half of cerebellum & inferior half of vermis. Is a branch of what?

What is PICA, a branch of the vertebral artery

200

Supplies the deep cerebellar nuclei & what else?

What is SCA, also the SCP & superior half of cerebellar cortex

300

Supplies a strip of ventral cerebellum including the flocculi; it also supplies ____ and is a branch of _____.

What is AICA. MCP. Basilar artery.

400

These three axon types make up the white matter & respectively are entering and leaving

What is purkinje axons leaving & mossy fibers & climbing fibers entering

500

Number of synapses one purkinje cell can make

What is 40,000

Anatomy makes me nervous

100

Separates the anterior lobe from the posterior lobe Separates the posterior lobe from the flocculonodular lobe

What is primary fissure What is the posteriolateral fissure

200

This is the oldest cerebellar region and it is primary involved in these two functions

What is the flocculonodular lobe: balance & eye movement

300

Names of internal nuclei from medial to lateral & mnemonic for remembering

What is Fat (Fastigial) Guys (globose) Eat (Emboliform) Donuts (Dentate)

400

The three layers of the cerebellar cortex from superficial to deep & which cell nuclei are found in each layer & which are inhibitory/excitatory

What is: Molecular: Basket, Stellate Purkinje: Purkinje Granular: Granular (only excitatory, all others inhibitory) & golgi

500

The cerebellum is derived from this structure

What are: The alar plates of the mesencephalon

Hook-ups

100

These originate from the inferior olive and project via ICP to the _____ (side) cerebellum. They make excitatory synapses with these two cell types.

What is climbing fibers. These originate from the inferior olive and project via ICP to the contralateral cerebellum. They make excitatory synapses with purkinje cells and deep cerebellar neurons.

200

Involved in informing the cerebellum about planned & ongoing movement, mossy fibers directly excite __*__s & deep cerebellar nuclei. __*__s inturn excite ALL cells with synapses in the _____ layer via their parallel fibers that run PARALLEL to the folia.

What are granular cells What is the molecular layer (stellate cells, purkinje dendrites, basket cells)

300

These cells are: * The only cells projecting OUT of the cerebellar cortex * Involved in timing of events or act as triggers for behavior * They also have complex sodium/calcium spikes that together with a slow discharge rate help develop motor memory via LTD.

What are purkinje cells.

400

Damage to this cerebellar blood supply and it's associated peduncle will result in hypertonia

What is PICA/ICP = hypertonia

500

Purkinje fibers from the flocculonodular lobe synapse here

What are vestibular neurons (& fastigial neurons)

Can you give me directions?

100

The turn by turn directions for the corticopontine input to the medial zone

Occipital lobe & medial cortex (trunk area) --> Ipsilateral pontine nuclei --> Dessucate as transverse pontine fibers --> Enter MCP--> Terminate as mossy fibers

200

Three "roads" I can take to enter ipsilaterally through the ICP to the medial zone

What are: dorsospinalcerebellar tract Cuneocerebellar tract Trigeminocerebellar tract

300

I'm in the spinal cord following the "spy"...where will she lead me?

Across the ventral white commissure to ventral spinal cerebellar tract Up to and across SCP to enter the cerebellum

400

I don't feel dizzy anymore, thanks for the directions!

Vestibular apparatus nuclei --> To medial cerebellum ipsilaterally via ICP

500

Thanks for the directions! This information for timing & motor learning was really important to deliver!

Inferior olivary nucleus of medulla --> Dessucate in contralateral cerebellum via ICP

Out & About

100

The LVST is made up of axons of these neurons. And the tracts function is to facilitate anti-gravity extensor muscles

What is lateral vestibular nucleus

200

These are the fastigial nucleus's two projections

What is the VL thalamus & Medullary Reticular Formation

300

A lesion here produces hypertonicity (bragging rights for explaining why)

What is ICP 1. interrupts inhibition on lateral vestibular neurons (therefore promoting extension) 2. Interrupts excitation on medullary reticular formation (MRST) which usually inhibits extensors

400

You just showed an example of testing for dysmetria & disdiodochokinesia! And yes, that is the location of a lesion that would result in these symptoms.

Dysmetria: pt touches nose to your finger (looking for overshoot) disdiodochokinesia: inability to perform rapid alternating movements What is SCP, paravermis or lateral hemisphere

500

It connects vestibular nuclei to occulomotor nuclei and is involved with eye movements

What is MLF (medial longitudinal fasiculus)