Test 4 - Ch. 18

Question 1

What does the spinal region consist of?

Answer 1

Efferent cell body – ventral horn

Afferent cell body – dorsal root ganglion

Question 2

Where does the spinal cord end?

Answer 2

about L1-L2

Question 3

What is the caudal equina?

Answer 3

ventral and dorsal roots trailing down inside spinal column getting ready to join and go out

Question 4

How is the dorsal root organized medially and laterally?

Answer 4

-SEGREGATE

MEDIALLY – DO NOT ENTER DORSAL HORN, COME IN DORSAL ROOT AND GO STRAIGHT TO DORSAL COLUMN AND GOES UP (DORSAL COLUMN MEDIAL LEMINISCUS – DISCRIMITATIVE TOUCH AND CONCIOUS PROPRIOCEPTION)

LATERAL GROUP – ENTER DORSAL HORN AND SYNAPSE THERE, CROSSES MIDDLE THEN GOES UP SPINAL COLUMN (SPINOTHALAMIC – PAIN AND TEMPERATURE)

Question 5

What does the dorsal column medial meniscus tract do and what is its pathway?

SENSORY

Answer 5

CAME IN DORSAL ROOT AND WENT RIGHT TO COLUMN

CEREBRAL CORTEX – DISCRIMITATIVE TOUCH AND CONCIOUS PROPRIOCEPTION

Question 6

Where is the spinocerebellar UMN pathway and what message does it carry?

SENSORY

Answer 6

NON-CONCIOUS PROPRIOCEPTION AND LIGHT TOUCH

-CEREBELLUM

Question 7

What are the four UMN pathways of pain, what message do they send and where are they located?

SENSORY

Answer 7

SPINOTHALAMIC – DISCRIMINATIVE PAIN AND TEMPERATURE

RETICULOSPINAL – AROUSAL AFTER PAIN

SPINOMESCENCEPHALIC – ORIENT HEAD AND START PAIN CONTROL PATHWAY THAT RETURNS BACK TO SC

SPINOEMOTIONAL – EMOTIONAL RESPONSE AND AUTONOMIC RESPONSE TO REGULATE HOMEOSTASIS

ANTEROLATERAL- WHITE MATTER

Question 8

WHAT ARE THE LATERAL UMN MESSAGING AND WHERE ARE THEY?

MOTOR

Answer 8

DISTAL EXTREMITIES

LATERAL CORTICOSPINAL – HIGH DEGREE OF CONTROL (CELL BODIES ARE MORE LATERAL NEAR COLUMN)

RUBROSPINAL - VOLUNTARY FLEXION IN UE

Question 9

WHAT DOES THE MEDIAL MOTOR UMN GROUP CONSIST OF?

MOTOR

Answer 9

MEDIAL CORTICOSPINAL – VOLUNTARY

VESTIBULOSPINAL – EQUILIBRIUM

RETICULOSPINAL – PICK STUFF UP

Question 10

WHERE IS THE AUTONOMIC CONTROL COLUMN AND WHERE DOES IT EXTEND TO?

Answer 10

AUTONOMIC CONTROL COLUMN THAT IS RIGHT NEXT TO SPINAL COLUMN

START IN PONS AND MEDULLA AND EXTEND DOWN

Question 11

WHERE ARE THE CELL BODIES OF THE SENSORY PATHWAYS?

Answer 11

DORSAL HORN

Question 12

WHERE ARE THE CELL BODIES OF THE PERIPHERAL AUTONOMIC SYSTEM?

Answer 12

OUTPUT OF AUTONOMIC SYSTEM DOES NOT START UNTIL T1
NO PERIPHERAL EFFERENTS IN CERVICAL SPINE

Lateral horn
T1-L2 / S2-S4

Question 13

WHICH pathway IS THE ONLY ONE THAT passes through spinal cord without synapse?

Answer 13

DORSAL COLUMN

Question 14

LIGHT TOUCH

Answer 14

IPSILATERAL

Question 15

PAIN

Answer 15

BILATERAL

Question 16

LATERAL CORTICOSPINAL

Answer 16

IPSILATERAL

Question 17

ANTERIOR CORD SYNDROME

Answer 17

MOTOR

PAIN AND TEMPERATURE

Question 18

BROWN-SEQUARD

Answer 18

Loss of discriminative touch sensation
- Same side as lesion
Loss of motor function
- Same side as lesion
Loss of pain & temperature sensation
- Opposite side as lesion

Question 19

DAMGE TO CAUDA EQUINA LEADS TO?

Answer 19

ALL BELOW
ATROPHY OF DENNERVATION
HYPOREFLEXIC – REFLEX LOOP ITSELF IS CUT – LMN AND PERIPHERAL SOMATOSENSORY ARE CUT CAUSING HYPOREFLEXIA LOOP GONE
LOSES DERMATOME SENSATION L2 AND BELOW