Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Neuroanatomy > Tracts > Flashcards

Tracts Flashcards

1
Q

What is white matter

A

Mixture of nerve fibre, neuroglia, blood vessels

White colour - myelination

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is white matter divided into

A

Anterior white column/funicuius

Lateral white column

Posterior white column

Anterior white commissure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Ascending sensory pathway

A

1st order -
Cell body in dorsal root ganglion

2nd order -
Axon crosses, ascends, terminates in thalamus

3rd order -
To cerebral cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Ascending tract definition

A

Neural pathway by which SENSORY information from peripheral nerves is transmitted to the cerebral cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Ascending tract to the CEREBRUM

A

Posterior column/medial lemniscal pathway
Spinothalamic tracts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Ascending tract to the CEREBELLUM

A

Spinocerebellar tracts - anterior and posterior
Cuneocerebellar tract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Ascending tract to the BRAINSTEM

A

Spinoreticular
Spinotectal
Spino-olivary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Posterior column / medial lemniscal

Function & the 2 pathways:

A

Modality - conscious proprioception, vibratory sense, fine touch / discriminative touch

Fasciculus Gracilis
- lower limbs & lower trunk (T6 down)

Fasciculus Cuneatus
- upper limbs & upper trunk

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Posterior column / medial lemniscal pathway

Order neurons

A

1st order neuron = dorsal root ganglion
- Fasciculus Gracilis
- Fasciculus Cuneatus

2nd order neuron = medulla oblongata
- Nucleus gracilis
- Nucleus cuneatus

3rd order neuron = thalamus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Lateral spinothalamic tract

Describe the 2 types of pain

A

FAST PAIN
A 𝛿 fibres
Myelinated
Localised
Fast conducting
Glutamate

SLOW PAIN
C fibres
Unmyelinated
Poorly localised
Slow conducting
Substance P

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Ipsilateral

A

Same side (problem on same side of spinal cord as the body)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Contra lateral

A

Opposite side (crossing over in spinal cord)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Posterior column / medial lemniscal pathway

Modality & receptors

A

Modality – Conscious proprioception, vibratory sense, fine touch/ discriminative touch

Receptors – Meissner’s corpuscle, Pacinian corpuscle, muscle spindle and Golgi tendon organ

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Lateral spinothalamic tract

Modality & receptors

A

Modality - pain & temperature

Receptors - free nerve endings, nociceptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Lateral spinothalamic tract

Order neurones

A

1st order = dorsal root ganglion

2nd order = substantia gelatinosa (cross over)

3rd order = thalamus (ventroposterior lateral nucleus)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Anterior spinothalamic tract

Modality & receptors

A

Modality - light (crude) touch & pressure

Receptors - free nerve endings

17
Q

Anterior spinothalamic tract

Order neurones

A

1st order = dorsal root ganglion

2nd order = substantia gelatinosa

3rd order = ventroposterior lateral nucleus of thalamus

18
Q

Posterior spinocerebellar tract

Modality, function & receptors

A

Modality = unconscious proprioception

Function = fine coordination of posture & movement of trunk & lower limb

Receptors = muscle spindles, Golgi tendon organs, joint receptors of trunk & lower limb

19
Q

Posterior spincerebellar tract
Order neurones

A

1st order = dorsal root ganglia

2nd order = lateral funiculus > medulla oblongata . Inferior cerebellar peduncle

3rd order = cerebellum

20
Q

Anterior spinocerebellar tract

Modality, function & receptors

A

Modality = unconscious proprioception

Function = gross coordination of posture & movements of trunk & lower limbs

Receptors = muscle spindles, Golgi tendon organs & joint receptors of trunk & lower limbs

21
Q

Anterior spinocerebellar tract

Order neurones

A

1st order = dorsal root ganglia

2nd order = contralateral lateral funiculus > medulla oblongata, pons, midbrain > superior cerebellar peduncle

3rd order = cerebellum

22
Q

Decending tracts

A

Carry motor information

23
Q

Pyramidal tract

A

Corticospinal tract (lateral & anterior)

24
Q

Extrapyramidal tracts

A

Rubrospinal - facilitates flexor & inhibits extensor muscles (crosses in superior colliculus of midbrain)

Reticulospinal - locomotion & postural control (uncrossed)

Vestibulospinal - facilitates extensors to maintain posture/balance & inhibits flexors (uncrossed)

Tectospinal - reflex postural movements in response to visual stimuli (crosses in superior colliculus of midbrain)

Olivospinal - reflex movements arising from proprioceptors (crosses in lateral white column)

25
Q

What are the 3 neuron pathways

A

1st order neuron - cerebral cortex (UMN)

2nd order neuron - internuncial neuron in the anterior grey column

3rd order neuron - motor neurons in the anterior grey column of spinal cord (LMN)

26
Q

Clinical significance of descending tracts

A

Amyotrophic lateral sclerosis (motor neuron disease)

Neuroanatomy (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions