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Question 1

What is the spinal tract that is associated with fine touch and proprioception?

Answer 1

Dorsal Column Tract

Question 2

What is the spinal tract that is associated with pain and temperature?

Answer 2

Lateral Spinothalamic Tract

Question 3

What is the spinal tract that is associated with crude touch and pressure?

Answer 3

Anterior Spinothalamic Tract

Question 4

What is the spinal tract that is associated with unconscious proprioception?

Answer 4

The Anterior and Posterior Spinocerebellar tractsand The Cuneocerebellar Tract

Question 5

Describe the route of the dorsal column tract

Answer 5

Receptors to medullaGracile/ Cuneate nucleus in the medulla to the venteroposterolateral nucleusVPL nucleus to the primary somatosensory cortex

Question 6

Describe the 1st order neurones in the dorsal column tract

Answer 6

Cell bodies are found in the dorsal root ganglionStay on the ipsilateral sideFibres from lower limb = fasciculi gracilisFibres from upper limb = fasciculi cuneate

Question 7

Describe the 2nd order neurones in the dorsal column tract

Answer 7

Run from the gracile/cuneate nucleus to venteroposterolateral nucleus of the thalamus, via the pons and the midbrain through the medial lemniscus- cell bodies found in the nucleus gracilis/cuneate

Question 8

Where does the dorsal column tract dessucate?

Answer 8

In the medulla

Question 9

Describe the third order neurones in the dorsal column tract

Answer 9

Run from the venteroposterolateral nucleus of the thalamus to the primary somatosensory cortes via thalamocortical radiations- terminate in the medial aspect of the somatosensory cortex

Question 10

What happens if there is damage to the dorsal column tract?

Answer 10

Below the medulla, there will be damage to the ipsilateral side

Question 11

What are the clinical signs that would occur with damage to the dorsal column tract?

Answer 11

Loss of tactile senseLoss of proprioceptionInability to identify objects placed in the hand

Question 12

Describe the route of the lateral spinothalamic tract

Answer 12

Nociceptors to dorsal hornDorsal horn to venteroposterolateral nucleus of the thalamusThalamocortical radiations ascend to the primary somatosensory cortex

Question 13

Where does dessucation occur in the lateral spinothalamic tract?

Answer 13

At the level of entry into the spinal cord

Question 14

Where do you find the cell bodies of the 1st order neurones of the lateral spinothalamic tract?

Answer 14

In the dorsal root ganglia

Question 15

Describe what happens when you get damage to the lateral spinothalamic pathway

Answer 15

Loss of pain and temperature sensation on the contralateral side. - can have some sensation remaining 1 or 2 levels below, as some 1st order neurones ascend/descend 1 or 2 levels in the zone of Lissauer before synapsing with their second order neurones.

Question 16

Which nerves are affected when there is a tumour or a lesion that expands from the grey matter?

Answer 16

The sacral and lumbar fibres lie dorsalaterally to the thoracic and cervical fibres, so the T and C will be affected first. Initially, this causes sacral and lumbar sparing as they will not be affected initially.

Question 17

Describe the path of the anterior spinothalamic tract

Answer 17

Same as the lateral spinothalamic tractNociceptors to dorsal hornDorsal horn to venteroposterolateral nucleus of the thalamusThalamocortical radiations ascend to the primary somatosensory cortex

Question 18

Describe the path of the posterior spinocerebellar tract

Answer 18

Neurones run from the receptors to lamina VII of the spinal cord, then the fibres ascend up to the cerebellum on the ipsilateral side

Question 19

Describe the path of the anterior spinocerebellar tract

Answer 19

Neurones run from the receptors to lamina VII of the spinal cord, then dessucate in the spinal cord and ascend in the anterolateral white matter, recross to the ipsilateral side at the superior peduncle of the pons, then runs to the cerebellum.

Question 20

What type of information does the anterior and posterior spinocerebellar tracts carry?

Answer 20

Information about whole limb movements and postural adjustments to the cerebellum.

Question 21

What happens when there is damage to the spinal cerebellar tracts?

Answer 21

Loss of proprioception and coordination to the contralateral limb.

Question 22

Describe the path of the cuneocerebellar tract

Answer 22

1st order neurones ascend on the ipsilateral side in the cuneocerebellar tract and synapse in the brainstem. After, the neurones travel to the cerebellum where they terminate.

Question 23

Describe the path of the trigeminal nerves

Answer 23

The nerves run to the trigeminal nucleus (brainstem) where the central processes synapse then they travels up to the thalamus where they synapse with the third order neurones and then run up to the cerebral cortex.