Step 1 - Neuro - Spinal Tracts

Front 1

Cell bodies of the first-order neurons of these tracts are in the dorsal root ganglion

Back 1

DCML (dorsal column) and STT (spinal thalamic)

Front 2

Decussation of the DCML occurs here

Back 2

Medulla

Front 3

Decussation of the STT occurs here

Back 3

Anterior white commissure (ascends contralaterally)
(thus it is knocked out by a syrinx)

Front 4

Decussation of the lateral corticospinal tract

Back 4

Pyramidal decussation (descends contralaterally)

Front 5

This is a four-order neuronal path

Back 5

Non-referred visceral pain (from central canal, to dorsal column nuclei, to medial lemniscus, to thalamus, to insular cortex)

Front 6

T/F: the 2nd order neuron of the DCML decussates

Back 6

True.

Front 7

T/F: the 2nd order neuron of the STT decussates

Back 7

True.

Front 8

T/F: the 2nd order neuron of the lateral corticospinal tract decussates

Back 8

False. The 1st order one does.

Front 9

T/F: ascending tracts synapse before decussating

Back 9

True.

Front 10

What kind of fibers do first order STT neurons have?

Back 10

A-delta and C fibers

Front 11

These neurons synapse rather than ascend up the spinal cord themselves

Back 11

First-order STT neurons (dorsolateral tract of Lissaeur)

Front 12

These neurons ascend up the spinal cord themselves before synapsing with second-order neurons

Back 12

First-order DCML neurons

Front 13

This tract descends via the internal capsule

Back 13

Lateral corticospinal tract

Front 14

This tract descends contralaterally

Back 14

Lateral corticospinal tract

Front 15

This tract decussates at the medullary pyramid

Back 15

Lateral corticospinal tract

Front 16

Sites of synapse of the DCML tract

Back 16

Ipsilateral cuneatus (hand, medial) or gracilis nuclei (legs, laterla) in the medulla, VPL of thalamus

Front 17

This tract synapses at the VPL

Back 17

DCML, STT

Front 18

This tract synapses at the VPM

Back 18

Trigeminal (CN V) tracts

Front 19

Sites of synapse of the STT

Back 19

Ipsilateral gray matter (spinal cord), VPL of thalamus

Front 20

Sites of synapse of the lateral corticospinal tract

Back 20

Anterior horn (spinal cord), neuromuscular junction

Front 21

Site of cell body of UMN

Back 21

Primary motor cortex

Front 22

Site of cell body of LMN

Back 22

Anterior horn of spinal cord

Front 23

Spastic paralysis is associated with this lesion

Back 23

UMN lesion

Front 24

Babinski sign is associated with this lesion

Back 24

UMN lesion

Front 25

Decreased DTRs are associated with this lesion

Back 25

LMN lesion

Front 26

Fasciculations are associated with this lesion

Back 26

LMN