Neurological Tracts

Question 1

Fasciculus gracilis (S)

Answer 1

Origin: DRG of S5-T6
Termination: Nucleus gracilis (medulla)
Impulse information: conscious proprioception, touch, pressure, two point discrimination, sterognosis

Question 2

Fasciculus Cuneatus (S)

Answer 2

Origin: DRG of T5- C1
Termination: Nucleus Cuneatus
Impulse information: conscious proprioception, touch, pressure

Question 3

Spinothalamic (S)

Answer 3

Origin: dorsal horn
Termination: thalamus(diencephalon)
Impulse information: lateral=pain & temperature, anterior = light touch

Question 4

Posterior Spinocerebellar (S)

Answer 4

Origin: Nucleus dorsalis(clarke’s)
Termination: Cerebellum
Impulse information: unconscious proprioception, muscle strength control, voluntary movements

Question 5

Anterior Spinocerebellar

Answer 5

Origin: base of dorsal horn
Termination: cerebellum
Impulse information: unconscious proprioception, muscle strength control, voluntary movements

Question 6

Lateral corticospinal (M)

Answer 6

Origin: 75% motor cortex(precentral gyrus)
Termination: alpha & gamma motor neurons
Impulse information: control of voluntary skilled movement

Question 7

Anterior corticospinal

Answer 7

Origin: 25% motor cortex(frontal & parietal lobes)
Termination: alpha & gamma motor neurons
Impulse information: control of voluntary skilled movement

Question 8

Tectospinal

Answer 8

Origin: roof of midbrain tectum, superior colliculi
Termination: interneurons in spinal cord
Impulse information: coordination of movements associated with visual input

Question 9

Rubrospinal (M)

Answer 9

Tegmentum in midbrain(red nucleus )🙊
Termination: interneurons in spinal cord
Impulse information: flexor muscle groups for posture and tone

Question 10

Vestibulospinal (M)

Answer 10

Origin: lateral vestibular nucleus (dieter’s nucleus)
Termination: interneurons in spinal cord
Impulse information: extensor muscle groups for posture and tone

Question 11

Reticulspinal

Answer 11

Origin:reticular formation
Termination: interneurons in spinal cord
Impulse information: coordination of motion and visceral outflow