Neuroscience: Anatomy Of The Spinal Cord

Front 1

for large DRG neurons, main branch __________ in dorsal funiculus; ipsilateral and contralateral branches for spinal reflexes (e.g. deep tendon)

Back 1

ascends

Front 2

for small DRG neurons, branches ascend and descend in ___________ ____________ ____ __________, synapse with second-order neurons in substantia
gelatinosa --> axons cross (decussate) in anterior white commissure, and ascend in spinothalamic tract

Back 2

dorsolateral fasciculus of Lissauer

Front 3

The caudal end of spinal cord

Back 3

conus medullaris

Front 4

sensory processing of pain
and temperature (substantia
gelatinosa)

Back 4

dorsal horn

Front 5

autonomic nervous system neurons; unconscious proprioception neurons

Back 5

intermediate horn (AKA lateral horn)

Front 6

command neurons for movement (alpha motor neurons)

Back 6

ventral horn

Front 7

Cell bodies of second-order
neurons that give rise to the ___________ pathway
live in the ___________ _________________
(bright area) of the dorsal horn.

Back 7

spinothalamic; substantia gelatinosa

Front 8

Proprioreceptive DRG first-order sensory neurons trasmit information about muscle tension and position and about joint angle and movement to neurons in the _____________ _____.

Back 8

intermediate/lateral horn

Front 9

Contains cell bodies of neurons that project axons in the posterior/dorsal spinocerebellar tract. Found at levels T1-L2/L3.

Back 9

Nucleus dorsalis of Clarke

Front 10

Contains cell bodies of neurons that decussate, and project axons in the anterior/ventral spinocerebellar tract. Found at levels L1-S2.

Back 10

Spinal border cells

Front 11

alpha motor neurons are the neurons found in the _________ ___________ that innervate skeletal muscle. They are often referred to as "_______ ________ ________"

Back 11

ventral horn; "lower motor neurons"

Front 12

The location of the alpha motor neuron cell bodies in the ventral horns is correlated with the location and function of the muscles they they innervate. This is called ...

Back 12

somatotopic organization

Front 13

What is effected in ALS?

Back 13

alpha motor neurons in the ventral horn of the spinal gray mater

Front 14

The spinal accessory motor nucleus is found in the ________ ________ of the upper cervical spinal cord and contains alpha motors neurons that innervate the _______ and _______ muscles.

Back 14

ventral horn; trapezius and sternocleidomastoid muscles

Front 15

What are the three funiculi of the spinal cord white matter and what type of axon tracts do they contain?

Back 15

1. dorsal funiculus -ascending
2. lateral funiculus - both ascending and descending
3. ventral funiculus -small descending tracts

Front 16

Which fasciculi are found within the dorsal funiculus?

Back 16

1. fasiculus gracilis (ascending sensory info LOWER limbs)
2. fasiculus cuneatus (ascending sensory info UPPER limbs)

Front 17

What are the ascending sensory tracts of the lateral funiculus?

Back 17

1. dorsal (posterior) spinocerebellar tract
2. ventral (anterior) spinocerebellar tract
3. spinothalamic tract

Front 18

What are the descending motor tracts of the lateral funiculus?

Back 18

1. lateral corticospinal tract
2. rubrospinal tract

Front 19

The dorsal spinocerebellar tract in the lateral funiculus contains axons of neurons found in the _________ _________ __ ___________.

Back 19

nucleus dorsalis of Clarke

Front 20

The ventral spinocerebellar tract in the lateral funiculus contains axons of __________ _______ _________ ________.

Back 20

spinal border cell neurons