Podcast
Questions and Answers
What type of cells are involved in transmitting information from proprioceptors in the first neuron?
What type of cells are involved in transmitting information from proprioceptors in the first neuron?
- Pseudounipolar cells (correct)
- Multipolar cells
- Unipolar cells
- Bipolar cells
Where do the axons of the second neuron pass through to reach the cerebellum?
Where do the axons of the second neuron pass through to reach the cerebellum?
- Through superior and inferior cerebellar peduncles (correct)
- Through the anterior horn of spinal cord
- Through the lateral funiculus of spinal cord
- Through the posterior horn of spinal cord
Which tracts run ipsilaterally in the spinal cord?
Which tracts run ipsilaterally in the spinal cord?
- All tracts mentioned in the text
- Cuneocerebellar and anterior spinocerebellar tracts
- Posterior spinocerebellar and cuneocerebellar tracts (correct)
- Anterior and posterior spinocerebellar tracts
Where do the neurons of the anterior spinocerebellar tract terminate?
Where do the neurons of the anterior spinocerebellar tract terminate?
What type of proprioception is transmitted through the neuronal pathways mentioned in the text?
What type of proprioception is transmitted through the neuronal pathways mentioned in the text?
Which nucleus is involved in the cuneocerebellar tract?
Which nucleus is involved in the cuneocerebellar tract?
Study Notes
Neuronal Pathways for Unconscious Proprioception
- Transmit unconscious proprioception through lateral funiculus of spinal cord
Anterior and Posterior Spinocerebellar Tracts
- Originate from lower limb (LL) and lower part of trunk
- Terminate in ipsilateral cortex of cerebellum (palliocerebellum – spinal cerebellum)
Cuneocerebellar Tract
- Originate from upper limb (UL) and upper part of trunk
- Terminate in ipsilateral cortex of cerebellum (palliocerebellum – spinal cerebellum)
First-Order Neurons
- Pseudounipolar cells in spinal ganglion
- Dendrites transmit information from tendon, muscle, and joint proprioceptors
- Axons continue to posterior horn of spinal cord
Second-Order Neurons
- Located in ipsilateral thoracic nucleus (Stilling-Clarke) of posterior horn (spinocerebellar tracts)
- Or located in accessory cuneate nucleus (cuneocerebellar tract)
- Axons pass through superior cerebellar peduncles (anterior spinocerebellar tract) or inferior cerebellar peduncles (posterior spinocerebellar and cuneocerebellar tracts) to cortex of cerebellum
Characteristics of Spinocerebellar and Cuneocerebellar Tracts
- Posterior spinocerebellar and cuneocerebellar tracts run ipsilaterally (do not cross over)
- Anterior spinocerebellar tract runs contralaterally in spinal cord and crosses over again, terminating in ipsilateral cerebellar cortex
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the pathways of unconscious proprioception, including the lateral funiculus of the spinal cord, anterior and posterior spinocerebellar tracts, and the cuneocerebellar tract.
