Specialized pathways of the Lateral Spinothalamic tract

Question 2

In addition to the Lateral Spinothalamic tract there are three parallel systems, what are they?

Answer 2

1. ) Spino-cervico-thalamic
2. )Spino-reticulo-thalamic
3. ) Spino-mesencephalic

Question 3

Spino-cervico-thalamic pathway contains what?

Answer 3

An extra neuron that originates in the dorsal horn

Question 4

The Spino-cervico-thalamic pathway ascends ipsilaterally/contralaterally where?

Answer 4

Ipsilaterally to a group of cells located at the level of the cervical dorsal horn

Question 5

Where do the fibers of the Spino-cervico-thalamic pathway join after reaching the cervical dorsal horn?

Answer 5

Fibers join the Medial lemniscal system

Question 6

The alternate pathway of the Medial lemniscal system carry modalities of what? (3)

Answer 6

1. ) Conscious proprioception
2. ) Discriminative touch
3. ) Pain and Temperature

—however the information in this pathway is non-localizable

Question 7

Spino-reticulo-thalamic pathways synapse where?

Answer 7

Reticular formation of the brain stem

Question 8

The Spino-reticulo-thalamic pathway eventually reaches what nuclei?

Answer 8

Medial and Intralaminar thalmic nuclei

Question 9

Medial and Intralaminar thalmic nuclei project where?

Answer 9

To widespread cortical areas include the Limbic System

Question 10

Limbic systems connections involve what area of the brain? and activate/influence what system?

Answer 10

–Hypothalamus

–Autonomic Nervous system

Question 11

The Spino-reticulo-thalamic pathway functions to what? (2)

Answer 11

1. ) Help analyze the stimulus within emotional domain
2. ) To activate SNS response

Question 12

The Spino-mesencephalic (spinotectal) pathway projects where?

Answer 12

Superior colliculus and Periaqueductal Gray in the midbrain

Question 13

The Spino-mesencephalic (spinotectal) pathway can activate what?

Answer 13

Decending pathways that are crical for modulating incoming painful stimuli

Question 14

What two specialized pathways can activate decending pathways originating from Raphe’s Nuceli (seratonin) and Locus Ceruleus (norepinepherine) of the reticular formation?

Answer 14

1. ) Spino-Reticulothalmic
2. ) Spino-mesencephalic

Question 15

Spino-reticulo-thalamic and Spino-mesencephalic pathways have decending projects to the spinal cord that function as what?

Answer 15

The proposed circuitry used in th emodifcation of the transmission of painful sensations

Question 16

The activated decending pathways from Spino-reticulo-thalamic and Spino-mesencephalic pathways originate from where?

Answer 16

1. ) Raphe’s nuclei (seratonin)
2. ) Locus Ceruleus (norepinepherine)

—of the reticular formation