CNS TRACTS OVERVIEW (Ascending)

What funiculus is gracilis in?

posterior

What cord level is gracilis found at?

all

What cord level does gracilis receive information from?

below T6

Where is the cell body for gracilis found?

dorsal root gangions

Where does gracilis synapse?

nucleus gracilis of medulla oblongata

How does gracilis cross over?

crosses over in the medulla oblongata

What type of information does gracilis carry?

2 pt touch discrimination, vibratory sensation, kinesthetic information from the lower extremity

How many neurons does gracilis include?

3

What funiculus is cuneatus found in?

posterior

What cord level is cuneatus found in?

T6 and above

What cord level does cuneatus receive information from?

T6 and above

Where can you find the cell body of cuneatus?

dorsal root gangions

Where does cuneatus synapse?

nucleus cuneatus of the medulla oblongata

How does cuneatus cross over?

crosses over in the medulla oblongata

What type of information does cuneatus carry?

2 pt touch discrimination, vibratory sensation, kinesthetic information from the upper extremity

How many neurons does cuneatus include?

3

What nuclei are contained within the medial lemniscus?

nucleus gracilis and cuneatus

Where does the medial lemniscus synapse?

VPL of thalamus

How does the medial lemniscus cross over?

yes, in medulla oblongata

What type of information does the medial lemniscus carry?

2 pt touch discrimination, vibratory sensation, kinesthetic information

What funiculus do you find the anterior spinothalamic tract?

anterior

At what cord level do you find the anterior spinothalamic tract?

all

Where do you find the cell body for the anterior spinothalamic tract?

posterior horn, reed laminate 3-6

Where does the anterior spinothalamic tract synapse?

VPL of thalamus

How does the anterior spinothalamic tract cross over?

gradually in the cord

What kind of information does the anterior spinothalamic tract carry?

light touch and pressure

How many neurons does the anterior spinothalamic tract include?

3

What funiculus do you find the lateral spinothalamic tract?

lateral

At what cord level do you find the lateral spinothalamic tract?

all

Where would you find the cell body for the lateral spinothalamic tract?

posterior horn, rexed lamina 2

Where does the lateral spinothalamic tract synapse?

VPL of thalamus

How does the lateral spinothalamic tract cross over?

abruptly in the cord

What kind of information does the lateral spinothalamic tract carry?

pain and temperature information

How many neurons does the lateral spinothalamic tract include?

3

What funiculus is the anterior spincerebellar tract found in?

lateral (periphery)

At what cord level do you find the anterior spinocerebellar tract?

all

Where do you find the cell body for the anterior spinocerebellar tract?

posterior horn, rexed lamina 3-6

Where does the anterior spinocerebellar tract synapse?

cerebellum via the superior cerebellar peduncle

How does the anterior spinocerebellar tract cross over?

crosses over twice, one in the cord and once in the medulla oblongata

What type of information does the anterior spinocerebellar tract carry?

gross, anticipatory proprioceptive movement from the lower body

How many neurons doe the anterior spinocerebellar tract include?

2

What area of the cord does the anterior spinocerebellar tract begin in?

lumbar-sacral grey laminae

What funiculus is the posterior spinocerebellar found in?

lateral (periphery)

At what cord level will you find the posterior spinocerebellar?

L3 and up Clarks nucleus

Where would you find the cell body for posterior spinocerebellar tract?

lateral horn; rexed lamina 7 (clarkes)

Where does the posterior spinocerebellar tract synapse?

cerebellum, via the inferior cerebellar peduncle

How does the posterior spinocerebellar tract cross over?

does no cross over

what tract does fine proprioceptive movement coming from below T3 follow?

gracilis

What type of information does the posterior spinocerebellar tract carry?

fine proprioceptive movement

How many neurons does the posterior spinocerebellar tract include?

2

What tract does fine proprioceptive movement from above C8 take?

cuneocerebellar tract

How many neurons does the cuneocerebellar tract include?

2