Spinal Cord

Front 1

Dorsal column
1) Contains

2) Conveys

Back 1

1) Ascending axons from ipsilateral DRG neurons that innervate mechanoreceptors and proprioceptors

2) Vibration, joint position, touch to thalamus

Front 2

________ contains second order neurons that receive input from dorsal roots and project to supra spinal levels.

Back 2

Dorsal horn.

Front 3

The _______ contains somatic motor neurons and the ______ contains preganglionic SNS fibers.

Back 3

Ventral horn; lateral horn.

Front 4

1) Prevent m from injury by eccentric contraction

2) Golgi tendon organs

Back 4

1) Ia interneurons

2) Ib interneurons

Front 5

Neural cells responsible for recurrent inhibition.

Back 5

Renshaw cells.

Front 6

1) A fibers

2) C fibers

Back 6

1) myelinated afferents

2) Pain fibers

Front 7

(Descending) Corticospinal tract

1) Function

2) Origin

3) Termination

4) Decussate?

Back 7

1) Voluntary movements

2) Motor areas (4,6) of cerebral cortex

3) Motor neurons in spinal cord

4) Yes, becomes the lateral corticospinal tract

Front 8

(Descending) Cortico-bulbar tract

1) Function

2) Origin

3) Termination

4) Decussate?

Back 8

1) Motor function

2) Central portion of cerebral peduncle of midbrain

3) Motor cranial nerve nuclei + other motor neurons

4) No.

Front 9

(Descending) Rubrospinal tract

1) Function

2) Origin

3) Termination

4) Decussate?

Back 9

1) Non-voluntary motor control involving flexion of the limbs.

2) Red nucleus in the midbrain (input from cerebral and cerebellar cortex)

3)

4) No

Front 10

(Descending) Lateral vestibulospinal tract

1) Function

2) Origin

3) Termination

4) Decussate?

Back 10

1) Provide corrective muscle function when the body/head tilt or change orientation in space.

2) Lateral vestibular nucleus in pons

3)

4) No

Front 11

(Descending) Reticulospinal tract

1) Function

2) Origin

3) Termination

4) Decussate?

Back 11

1) Modulates postural adjustment and locomotion (gait) and influences the cortical excitation/inhibition at the spinal level (modulation of neural inputs)

2) Pontine and medullary reticular formations.

3) Spinal motoneurons

4) No

Front 12

(Descending) Tectospinal tract

1) Function

2) Origin

3) Termination

4) Decussate?

Back 12

1) Mediate the reflex postural movements of the head in response to visual/auditory stimuli.

2) Superior colliculus

3) Cervical spinal cord

4) Yes

Front 13

(Ascending) Dorsal column pathways -- Cuneate and Gracile

1) Function

2) Origin

3) Termination

4) Decussate?

Back 13

1) Carries modalities of discriminative touch, joint position, and sense of vibration

2) Synapse at the medulla where they cross and become the medial lemniscus...

3) ..., ascends through brainstem, relays in thalamus, and projects to cortex.

4) Yes, at the level of medulla

Front 14

(Ascending) Anterolateral system

1) Function

2) Origin

3) Termination

4) Decussate?

Back 14

1) Carries modalities of pain and temperature and crude/light touch

2) Synapse at dorsal horn where they cross before ascending to the brain...

3) ... fibers relay in thalamus and many project to primary sensory cortex.

4) Yes, before ascending to the brain.

Front 15

(Ascending) Component of anterolateral system called the anterior/lateral spinothalamic tract. This transmits information to the ________________________ nucleus of the thalamus. It transmits information about _________________ (4 modalities).

Back 15

Ventral posterolateral nucleus of thalamus; pain, temperature, itch, crude touch.

Front 16

(Ascending) Dorsal spinocerebellar tract: Conveys feedback from (2 modalities) __________ to the ____________ (ipsilateral/contralateral) cerebellum. The pathway is critical for _____________.

Back 16

Proprioception and low-threshold mechanoreceptors; ipsilateral cerebellum; maintenance of station and gait.

Front 17

(Ascending) Ventral spinocerebellar tract: Axons ascend ____________ (ipsilateral/contralateral) in the spinal cord and then cross again in the ___________ to terminate in the ipsilateral __________.

Back 17

Contralaterally; superior cerebellar peduncle; vermis/paravermis.

Front 18

(Ascending) Spinoreticular tract: autonomic responses to __________. Axons are relayed from the spinal cord --> ___________ --> thalamus --> ___________.

Back 18

Pain; reticular formation; cortex