Term
| what is the function of spinocerebellar pathways |
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Definition
| convey ascending non-conscious proprioceptive (sensory) information to the cerebellum ipsilaterally |
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Term
| do the spinocerebellar pathways contain axons that conduct quickly or slowly? |
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Definition
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Term
| what is conscious proprioception |
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Definition
| knowing where your extremities are when you close your eyes |
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Term
| through what final pathway do the spinocerebellar tracts enter the cerebellum? |
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Definition
| inferior cerebellar peduncle |
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Term
| what is unconscious proprioception |
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Definition
| our knowledge of where our bodies is without really thinking about it |
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Term
| what are the 3 major ascending pathways that carry non-conscious proprioception infrmation to the cerebellum |
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Definition
| cuneocerebellar pathway; dorsal (posterior) spinocerebellar pathway; spinolivary pathway |
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Term
| through what pathway does conscious proprioception information ascend to the sensory cortex? |
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Definition
| dorsal column medial lemniscus pathway |
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Term
| where does the dorsal spinocerebellar tract originate |
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Definition
| nucleus dorsalis = clark's nucleus |
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Term
| where is the nucleus dorsalis/clark's nucleus |
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Definition
| in the thoracolumbar dorsal horn of the spinal cord |
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Term
| from what areas does the nucleus dorsalis/clarke's nucleus receive proprioceptive information? |
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Definition
| muscle spindles, golgi tendons, joint receptors from the lower limb and trunk (below T1) |
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Term
| does the dorsal spinocerebellar tract ascend ipsilaterally or contralaterally in the spinal cord? |
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Definition
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Term
| through what pathway does the dorsal spinocerebellar tract enter the cerebellum |
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Definition
| inferior cerebellar peduncle |
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Term
| in what region of the spinal cord is the nucleus dorsalis/clarke's nucleus? |
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Definition
| C8-L4, both sides of the spinal cord, in the gray matter |
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Term
| what are the steps of the dorsal spinocerebellar tract? |
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Definition
| proprioceptive information from muscle spindles, golgi tendon organs, and joint receptors below L1 go to Clarke's nucleus in the spinal cord C8-L4. The tract ascends ipsilaterally through the dorsal spinocerebellar tract. The tract enters the cerebellum through the inferior cerebellar peduncle |
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Term
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Definition
| a tract that axons go through |
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Term
| what type of axonal fibers go through the dorsal spinocerebellar tract |
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Definition
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Term
| are type Ia large or small axonal fibers? |
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Definition
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Term
| are type Ia axonal fibers fast? |
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Definition
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Term
| why is it significant that the dorsal spinocerebellar tract has type Ia fibers |
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Definition
| extremely fast conduction through the axons keeps the cerebellum informed about movements |
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Term
| where does the cuneocerebellar pathway project to |
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Definition
| to the accessory (external) cuneate nucleus |
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Term
| where is the accessory (external) cuneate nucleus? |
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Definition
| lies just above/outside the cuneate nucleus in the medulla |
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Term
| from what areas of the body does the accessory (external) cuneate nucleus receive afferent proprioceptive information? |
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Definition
| from the upper limbs and upper trunk (above T1) |
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Term
| does the cuneocerebellar pathway ascend ipsilaterally or contralaterally through the spinal cord |
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Definition
|
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Term
| in what region of the spinal cord is the cuneocerebellar pathway |
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Definition
|
|
Term
| through what does the cuneocerebellar pathway enter the cerebellum? |
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Definition
| inferior cerebellar peduncle |
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Term
| what are the steps cuneocerebellar pathway |
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Definition
| proprioceptive information from muscle spindles, golgi tendon organs, and joint receptors above T1 comes into spinal cord, goes up the cuneocerebelar pathway in the dorsal column, projects to accessory cuneate nucleus in the medulla, ascends cuneocerebellar pathway, and enter the cerebellum via the inferior cerebellar peduncles |
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Term
| what information ascends to the cerebellum through the spinolivary pathway |
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Definition
| non-consciousproprioceptive afferents from the limbs |
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Term
| how is the spinolivary pathway redundant |
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Definition
| the dorsal spinocerebellar tract and cuneocerebellar tract also convey nonconscious proprioceptie information from the limbs |
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Term
| what are the steps of the spinolivary pathway |
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Definition
| non-conscious proprioceptive information of the limbs enter the spinal cord, cross to the other side, ascend through the spinolivary pathway to the inferior olive nucleus in the medulla, cross over again, and project to the same-side-as-original cerebllum through the Inferior cerebellar peduncle |
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Term
| do the proprioceptive afferents in the spinolivary pathway travel up through the ipsilateral or contralateral side of the spinal cord |
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Definition
|
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Term
| does the proprioceptive information that travels in the spinolivary tract end up in the same or opposite side of the cerebellum? |
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Definition
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Term
| to what does information from the spinolivary pathway first project |
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Definition
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