Major Descending/Ascending Tracts

Question 1

spinal cord sends info through these tracts to the brain

Answer 1

Afferent

Question 2

body receives info through these tracts

Answer 2

Efferent

Question 3

Efferent nerve bundle, located in the ventral-medial cord, it carries impulses from the motor cortex to the muscles and organs; this tract is smaller than the lateral corticospinal tract

Answer 3

Anterior Corticospinal Tract

Question 4

Efferent nerve bundle, located in the lateral, slightly doral, aspect of the spinal cord; sends impulses to control muscles & organs

Answer 4

Lateral Corticospinal Tract

Question 5

Efferent nerve bundle, descends from the midbrain /c input from the ipsilateral cerebral cortex (same side of body) & contralateral cerebellar nuclei (opposite side of body) /c projections to the anterior cervical spinal cord via interneurons; assists /c FMC (manual dexterity) in the upper extremities by facilitating flexor muscle activity while inhibiting extensor activity.

Answer 5

Rubospinal Tract

Question 6

Efferent nerve bundle, descends from superior colliculus to the anterior cervical spinal cord; aids in directing head movement in response to visual & auditory stimuli

Answer 6

Tectospinal tract

Question 7

lie in the dorsal medial tract of the spinal cord & transmit joint & muscle sensation to the brain

Answer 7

Fasculus Cuneatus & Faniculus Gracilis

Question 8

Ventral lateral tracts that carry sensations of pain & temperature

Answer 8

Lissauer’s Tract

Question 9

Sends info to the cerebellum, helping to interpret proprioception.

Answer 9

Anterior & posterior spinocerebellar tracts

Question 10

mediates pain & temperature sensation

Answer 10

Lateral Spinothalamic Tract

Question 11

transmits impulses of touch to the brain

Answer 11

Ventral Spinothalamic Tract

Question 12

sends sensory info from the body to the reticular formation of the thalamus; most likely responsible for reflex responses to pain

Answer 12

Spinoreticular Tract

Question 13

carries info from the spinal cord to the tectum, which possesses info from the eyes & other sensory organs

Answer 13

Spinotectal Tract

Question 14

most common injury leading to this syndrome is a fall resulting in neck hyperextension; presents as weakness & numbness, primarily in the arms vs legs & often accompanied /c bowel/bladder incontinence. a person /c this is often able to walk but struggles to grasp things, feed themselves or groom themselves 2* hand weakness

Answer 14

Central Cord Syndrome

Question 15

occurs when only one side of the spinal cord is injured or damaged, preserving the other side; this person would present /c ipsilateral paralysis, loss of light touch sensation on the side of the lesion & loss of pain/temp sensation on the contralateral side.

Answer 15

Brown-Sequard Syndrome

Question 16

Marked by loss of muscle control, pain & temperature sensation but w/o loss of proprioception & touch sensation

Answer 16

Anterior Cord Syndrome

Question 17

rare syndrome; primarily occurs /c intraoperative complications in spinal surgery /c necrosis of the posterior spinal cord; the patient process strength but has no sense of where their limbs are in space below the level of damage.

Answer 17

Posterior Cord Syndrome