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Neuroanatomy > Ascending Pathways > Flashcards

Ascending Pathways Flashcards

1
Q

What are three examples of ascending pathways?

A

Spinothalamic

Medial lemniscus

Trigeminothalamic

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2
Q

What are the two types of senses?

A

Special and general senses

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3
Q

What is a special sense?

A

Localised sense by their respective sensory organ

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4
Q

How many special senses are there?

A

5

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5
Q

Which nerves carry the special senses?

A

Cranial nerves

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6
Q

What are the five special senses?

A

Olfaction

Vision

Taste

Hearing

Vestibular

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7
Q

Which cranial nerve carries olfaction?

A

CN1 - olfactory

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8
Q

Which cranial nerve carries vision?

A

CN2 - optic

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9
Q

Which cranial nerves carry taste?

A

CN7 - facial
CN9 - glossopharyngeal

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10
Q

Which cranial nerve carries hearing?

A

CN8 - vestibulocochlear

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11
Q

Which cranial nerve carries vestibular?

A

CN8 - vestibulocochlear

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12
Q

What are general senses?

A

Senses that are spread throughout the body

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13
Q

What are examples of general senses?

A

Interoception

Exteroception

Proprioception

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14
Q

What is interoception?

A

Awareness of internal environment

Pain, temperature, touch pressure of viscera

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15
Q

What is exteroception?

A

Awareness of external stimuli

Pain, temperature, touch pressure of external world

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16
Q

What is proprioception?

A

Position sense/awareness of space occupied by joints/tendons/ligaments

17
Q

What are general senses detected by?

A

Sensory receptors e.g. nociceptors, thermoreceptors, mechanoreceptors, chemoreceptors, baroreceptors

18
Q

What is a dermatome?

A

Area of skin of skin supplied by a particular spinal nerve in the PNS

19
Q

How many dermatomes are there in the human body?

A

31

20
Q

What information is the spinothalamic pathway involved in?

A

Pain, temperature, crude touch

21
Q

What information is the medial lemniscus pathway involved in?

A

Fine touch, conscious proprioception

22
Q

What information is the spinocerebellar pathway involved in?

A

Proprioception

23
Q

How many orders of neurons are there in ascending somatosensory pathways?

A

Three orders of neurons

24
Q

Where is the first order of neurons located in ascending pathways?

A

Dorsal root ganglion

25
Q

Where is the second order of neurons located in ascending pathways?

A

Grey matter of spinal cord

26
Q

Where is the third order of neurons located in ascending pathways?

A

Ventral posteromedial nucleus of thalamus

27
Q

Which four cranial nerves make up the trigeminothalamic tract?

A

Trigeminal
Facial
Glossopharyngeal
Vagus

28
Q

Where do the trigeminothalamic nerve tracts synapse?

A

Trigeminal nuclear complex

29
Q

Where do the trigeminothalamic nerve tracts project to?

A

Post central gyrus / primary sensory cortex

Neuroanatomy (14 decks)

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