Podcast
Questions and Answers
Which pathway involves the influence of the dentate nucleus on ipsilateral motor activity?
Which pathway involves the influence of the dentate nucleus on ipsilateral motor activity?
What is the role of the globose and emboliform nuclei in the cerebellum according to the text?
What is the role of the globose and emboliform nuclei in the cerebellum according to the text?
Which nucleus is involved in the fastigial reticular pathway?
Which nucleus is involved in the fastigial reticular pathway?
Through which pathway does the vestibular nerve communicate with the cerebellar cortex?
Through which pathway does the vestibular nerve communicate with the cerebellar cortex?
Signup and view all the answers
Which tract is responsible for crossing over to influence the contralateral red nucleus?
Which tract is responsible for crossing over to influence the contralateral red nucleus?
Signup and view all the answers
Which of the following pathways involves the cerebellar hemisphere influencing ipsilateral motor activity?
Which of the following pathways involves the cerebellar hemisphere influencing ipsilateral motor activity?
Signup and view all the answers
What effect do the globose and emboliform nuclei have on motor activity according to the text?
What effect do the globose and emboliform nuclei have on motor activity according to the text?
Signup and view all the answers
Study Notes
Cerebellum Anatomy
- The cerebellum lies in the posterior cranial fossa and is the largest part of the hindbrain.
- It is located posterior to the 4th ventricle, pons, and medulla.
- The cerebellum consists of two cerebellar hemispheres connected by the vermis.
Connections to Brainstem
- The cerebellum is connected to the brainstem by peduncles:
- Superior cerebellar peduncle connects to the midbrain.
- Middle cerebellar peduncle connects to the pons.
- Inferior cerebellar peduncle connects to the medulla.
Fissures and Lobes
- The cerebellum has three fissures:
- Fissure prima separates the anterior lobe from the middle lobe.
- Postero-lateral fissures separate the flocculo-nodular lobe from the middle lobe.
- Horizontal fissure separates the superior and inferior borders of the hemisphere.
- The cerebellum has three main lobes:
- Anterior lobe: lies in front of the fissure prima and includes the lingula.
- Middle lobe: extends from the fissure prima to the postero-lateral fissure and includes the tonsil.
- Flocculo-nodular lobe: consists of the nodule of the vermis and two flocculi.
Functional Division
- The cerebellum is functionally divided into:
- Archi-cerebellum (vestibular cerebellum): includes the flocculo-nodular lobe and the lingula, and is related to equilibrium and maintenance of head position.
- Paleo-cerebellum (spino-cerebellum): includes the anterior lobe minus the lingula, and is connected to the spinal cord, concerned with muscle tone.
- Neo-cerebellum: includes the middle lobe, and is connected to the cerebral cortex via the ponto-cerebellar pathway, concerned with sequence and timing of movement.
Zones and Nuclei
- The cerebellum is divided into longitudinal zones:
- Vermal zone: occupies the vermis.
- Intermediate (or paravermal) zone: lies on each side of the vermis.
- Lateral zone: lies just lateral to the intermediate zone.
- The inner white matter of the cerebellum contains four intracerebellar nuclei:
- Dentate nucleus.
- Emboliform nucleus.
- Globose nucleus.
- Fastigial nucleus.
Blood Supply
- The cerebellum is supplied by:
- Superior cerebellar artery (from basilar artery).
- Anterior inferior cerebellar artery (from basilar artery).
- Posterior inferior cerebellar artery (from vertebral artery).
Pathways
- From cerebral cortex:
- Cortico-pontino-cerebellar pathway.
- Cerebro-olivo-cerebellar pathway.
- Cerebro-reticulo-cerebellar pathway.
- From spinal cord:
- Anterior spino-cerebellar tract.
- Posterior spino-cerebellar tract.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on the anatomy and blood supply of the cerebellum. Questions cover the lateral zone, intracerebellar nuclei, and the blood supply from different arteries.
