Fasciculi Tracts#2 (Ascending)

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cuneatus, posterior

Fasciculus gracilis, and what other tract____ make up ________ column.

Various dorsal root ganglia (DRG)

The cell bodies that send axons to form the fasciculus grasilis, and cuneatus tracts are located where?

Fasciculus Gracilis

This tract is slender shaped, and is located in the medial aspect of the dorsal funiculus.

Fasciculus gracilis, Fasciculus cuneatus

The cell bodies origin for which tract(s) is the DRG?

Fasciculus grasilis, Spinothalamic, Anterior spinocerebellar, the tract that is both ascending and descending is fasciculus proprius.

These ascending tracts run to all the cord levels, with the exception to one tract that is both ascending and descending. Name that tract as well.

nucleus gracilis of M.O.

Fibers synapse where for the fasciculus gracilis tract?

Nucleus cuneatus of M.O.

Fibers synapse where for the fasciculus cuneatus tract?

Fasciculus cuneatus

This tract is found running to levels T5 or T6 and up

gracilis, cuneatus, posterior spinocerebellar, cuneocerebellar

List the ascending tracts that are ipsilateral-or cell bodies stay on the same side.

T6 or below

The origin of the fasciculus gracilis is?

T5-T6 and above

The origin runs where of the fasciculus cuneatus is?

All cord levels, enlarging as it ascends the cord.

The levels that the spinothalamic tract are found at are?

Posterior spinocerebellar

This tract does NOT run below L3 and is carried up the gracilis and synapses in Clarke's Nucleus

gracilis, cuneatus

Which tracts share the same functions of simply being major pathways carrying such sensations(partic. from distal ends of extremities) such as1. Discrimination of touch(2pt.) and Vibratory sensations 2. Kinesthetic sensation(conscious proprioception)

cuneatus, gracilis (fasciculus)

Romberg's test is considered a function of what two tracts?

Spinothalamic

Name the primary tract (other ascending tracts do too) that is formed from axons that come from cell bodies in the gray horns of the cord.

in the cord's gray laminae

The dorsal root fibers bringing sensations into the cord must synapse where?

Anterior and Lateral funiculi border

What is the location of the spinothalamic tract?

Anterolateral system

What is another name for the anterior and lateral funiculi border?

spinothalamic tract

Name the tract that runs to all cord levels and will naturally enlarge as it ascends the cord.

Mostly contralateral fibers, Spinothalamic tract

Name the type of fibers and what tract crosses gradually in the anterior region and abruptly in the lateral extremes.

(crosses) gradually in the anterior region, (abruptly crosses) in the lateral extreme

Name where the spinothalamic tract crosses first, and then abruptly crosses after.

functions of spinothalamic tract

what is the connection if any, (and tract name) this tract has with Pain and Thermal Input, and Light Touch.

Especially in the lateral funiculus, anterior funiculus, spinothalamic tract

Functions of pain and thermal input, and light touch occur where and in what tract?

The spinothalamic tract, the anterior and lateral spinothalamics

This tract used to be considered two seperate tracts, but now is considered one continuous tract, even though some functional variation is recognized at the extremes.(name the tract now, and give the name(s) it used to be as well.)

clinically

In what way are the spinothalamic tracts very important?

Analgesia, thermoanesthesia, spinothalamic tract, opposite side of body

Lesions here in this tract lead to________(pain loss), and ___________(temperature loss) to where?

in the thalamus (VPL Nuclei)

The fibers of the spinothalamic tract terminate where?

Thalamus, higher cortical centers

Some appreciation for pain and thermal sensation may be established where? Relay to ______is necessary for complete conscious appreciation?

Fasiculus gracilis, fasciculus cuneatus, spinothalamic tract

Name three ascending tracts functions that all end at the post central gyrus?

Post central gyrus

This is considered to be the primary(1') sensory cortex for taste, hearing, and seeing in the brain

(the pathway of the) spinothalamic tract

Name the tract that has a pathway that terminates in the opposite side of where the sensation is coming from

T6 cord level

In reference to the gracilis, and cuneatus tracts, these fibers now enter "cuneatus" at what level?

Anterior Spinocerebellar tract

This tract has a location along the periphery of the lateral funiculus and runs anterior to posterior

both run along the periphery of the lateral funiculus, posterior runs posterior to anterior (spinocerebellar tract), anterior runs anterior to posterior (spinocerebellar tract)

Compare and contrast the locations of the anterior and posterior spinocerebellar tracts

Ant. spinocerebellar

Known as a "double crosser" b/c most of these fibers cross in the cord, and then cross back again as they enter the cerebellum.

mostly lumbosacral cord's gray laminae

The cell bodies-fibers origins- of the anterior spinocerebellar tract are found where?

Posterior spinocerebellar tract, (C8-L3), below L3.

this tract has fibers that originate from cell bodies in Clarke's Column (nucleus) found in what part of the spine? This tract is not found running ______?

Posterior spinocerebellar tract

This tract is below L3, inferior to L3 proprioceptor fibers are carried up(hitch-hike) in gracilis up to L3-L2 levels, and synapses in Clarke's Nucleus.

in the cerebellum, superior cerebellar peduncle

The anterior spinocerebellar tract has fibers that terminate ___________ via the _______(some fiber exceptions)

Fibers terminate in the cerebellum via the inferior cerebellar peduncle (some fiber exceptions)

Name the place of termination for the fibers of posterior spinocerebellar tract

Function of the anterior spinocerebellar tract

Sends to the cerebellum input on general state of gross movements of lower body, and general activity of what is about to happen from motor neurons in that part of the cord.

Function of the Posterior spinocerebellar tract

Proprioceptive input dealing mainly with fine movements from what has just happened in the muscle itself.

Ant. spinocerebellar, post. spinocerebellar

tract that's function describes What is about to happen,tract that describes What just happened

Proprioceptive, fine movements, posterior spinocerebellar tract

____________fibers dealing with___________from the lower extremity may enter the cord at levels below clarke's nucleus in this tract.

function of the Cuneocerebellar tract

Proprioceptive input of fine movements from the pectoral girdle and extremity.

accessory cuneate nucleus of M.O.

The cuneocerebellar cell bodies originate where?

M.O.'s accessory cuneate nucleus

The cuneocerebellar tracts fibers enter the cervical cord, and ascend to synapse________?

cuneocerebellar tract

The fibers that leave the accessory cuneate nucleus form the ___________?

inferior cerebellar peduncle

The cuneocerebellar tract's fibers ascend to the cerebellum thru_________?

the Cuneocerebellar tract

This tract does for our arms and hands what clarke's nuclei and the posterior spinocerebellar tracts do for the lower body, legs and feet.

Ipsilateral, no

Is the cuneocerebellar tract ipsilateral or contralateral? Does it cross? If so, where?

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