chapter 15 somatic and motor pathways

Question 1

what are the ascending/sensory pathways?

Answer 1

spinothalamic- (lateral and anterior spinothalamic tracts)
Posterior column - (gracile and cuneate fasciculus)
spinocerebellar (anterior and posterior spinocerebellar pathways)

Question 2

what are the descending/motor pathways?

Answer 2

corticospinal pathway- (corticobulbar tract, lateral and anterior corticospinal tract)
Medial pathway- (vestibulospinal tract, tectospinal tract, and reticulospinal tract)
Lateral pathway- rubrospinal tract

Question 3

characteristics of lateral spinal thalamic tract

Answer 3

pain, temperature, 3rd order

Question 4

characteristics of anterior spinal thalamic tract

Answer 4

crude touch and pressure, 3rd order

Question 5

characteristics of gracile fasciculus

Answer 5

proprioception and fine touch, ventral pressure, vibration from inferior half of body, 3rd order

Question 6

characteristics of cuneate fasciculus

Answer 6

proprioception and fine touch, ventral pressure, vibration from superior half of body, 3rd order

Question 7

characteristics of posterior spinocerebellar pathway

Answer 7

proprioception, 2nd order, cerebellar cortex

Question 8

characteristics of anterior spinocerebellar pathway

Answer 8

proprioception, 2nd order, cerebellar cortex

Question 9

what are the descending/motor pathways

Answer 9

corticospinal- (corticobulbar, lateral corticospinal, anterior corticospinal)
Medial pathway- (vestibulospinal tract, tectospinal tract, reticulospinal)
Lateral pathway- rubrospinal

Question 10

characteristics of corticobulbar tract

Answer 10

upper motor neuron: primary motor cortex,
lower: cranial nerve nuclei in brain stem
action: conscious control of skeletal muscles

Question 11

characteristics of lateral corticospinal tract

Answer 11

upper motor neuron: primary motor cortex,
lower: anterior gray horn of spinal cord
action: conscious control of skeletal muscles

Question 12

characteristics of anterior corticospinal tract

Answer 12

upper motor neuron: primary motor cortex,
lower: anterior gray horn of spinal cord
action: conscious control of skeletal muscles

Question 13

characteristics of vestibulospinal

Answer 13

upper motor neuron: vestibular nuclei (border of pons and medulla)
lower: anterior gray horn of spinal cord
action: subconscious regulation of balance and muscle tone

Question 14

characteristics of tectospinal

Answer 14

upper motor neuron: tectum (superior and inferior colliculi)
lower: anterior gray horn of cervical spinal cord
action: subconscious regulation of head, neck, eye, and upper limb response to visual and auditory stimuli

Question 15

characteristics of reticulospinal

Answer 15

upper motor neuron: medulla oblongata and surrounding brain stem area
lower: anterior gray horns of spinal cord
action: subconscious regulation of reflex activity

Question 16

rubrospinal

Answer 16

upper motor neuron: red nuclei of midbrain
lower: anterior gray horn of
action: subconscious regulation of upper limb muscle tone and movement