Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Cerebellum
Chapter 13 - A & P Lecture
| Question | Answer |
|---|---|
| what is the location of the cerebellum? | a major structure of the brain located posterior (behind) the pons and attached to the brainstem. |
| what is the cerebellum's general role? | coordinate information between the brain and body |
| what is the outer layer (cortex) composed of? | gray matter |
| describe the structures of the outer layer? | Folded into thin ridges called folia |
| what is the inner layer composed of? | white matter |
| describe the structures of the inner layer? | Arranged in a branching, tree-like pattern called the arbor vitae (“tree of life”) |
| what is Deep Cerebellar Nuclei? | - Embedded within the white matter - Serve as the main output centers of the cerebellum |
| The cerebellum is divided into ___ primary regions | 3 |
| list the primary regions of the cerebellum: | Flocculonodular Lobe, Vermis,Cerebellar Hemispheres |
| describe the Flocculonodular Lobe: | - Small and located inferiorly - associated with balance and eye movements |
| describe the Vermis: | - A narrow, central ridge - Connects the two hemispheres - Involved in postural control |
| describe the Cerebellar Hemispheres: | - Two large lateral regions - Each hemisphere is divided by the primary fissure into: Anterior lobe Posterior lobe |
| The cerebellar cortex contains more ______than the entire cerebral cortex, making it one of the most _____-_____ regions in the brain. | neurons, neuron-dense |
| Key neuron types: | Purkinje cells Granule cells Basket cells & Stellate cells Golgi cells |
| Purkinje cells: | The primary output neurons of the cerebellar cortex Large, highly branched dendritic trees |
| Granule cells | Extremely numerous; excitatory |
| Basket cells & Stellate cells | Inhibitory interneurons that regulate Purkinje cell activity |
| Golgi cells | Modulate input from granule cells |
| The cerebellum does not initiate ______—instead, it refines, ______, and corrects it. | movement, coordinates |
| Functions of the Cerebellum: | Control of Muscle Movement and Tone Balance and Equilibrium Regulation of Intentional Movement Motor Learning |
| Control of Muscle Movement and Tone | - Ensures movements are smooth and coordinated - Regulates muscle tone (baseline level of contraction) |
| Balance and Equilibrium | - Integrates input from: Inner ear (vestibular system) Eyes Proprioceptors (body position sensors) |
| Regulation of Intentional Movement | - Adjusts: Force Timing Direction - Prevents movements from being jerky or inaccurate |
| Motor Learning | - Critical for learning skilled actions, such as: Riding a bike Playing an instrument Typing |
Created by:
academicweapon.com