Test 4 - Ch. 20

Question 1

What is the job of the cerebral peduncles?

Answer 1

bring UMN down to tracts

Question 2

What message is carried in the inferior peduncle?

Answer 2

NEED to do

Question 3

What message is carried in the middle peduncle?

Answer 3

change

Question 4

What message is carried in the superior peduncle?

Answer 4

WANT to do

Question 5

What tract is at the most anterior portion of the base of the BS?

Answer 5

corticospinal tract

Question 6

What tract is in the middle of the BS?

Answer 6

TRACT OF SENSORY – UNCONCIOUS TOUCH AND PROPRIOCEPTION, CONCIOUS TOUCH AND PROPRIOCEPTION

TOUCH AND PAIN COME TOGETHER AT BS TO END IN SAME CORTEX LOCATION

MEDIAL LEMINISCUS

Question 7

What is the name of the “roof” of the fourth ventricle?

And what do the four bumps do?

Answer 7

Tectum

2 X SUPERIOR Colliculi – INVOLVED IN TURNING HEAD IN RESPONSE TO VISUAL INPUT
-PERIPHERAL VISION – MESSAGE TO SUPERIOR COLLICULI – TURN HEAD TO SIGHT – INVOLUNTARY

2 X INFERIOR – INVOLVED IN TURNING HEAD IN RESPONSE TO AUDITORY INPUT

Question 8

What are the four outputs of the reticular formation?

Answer 8

1. OUTPUTS TO HEAD - REGULATES CONCIOUSNESS AND SLEEP-WAKE CYCLE – AROUSAL
2. OUTPUT TO ALL THREE HORNS OF SC
   A. DORSAL HORN OF SC – NEURONS FROM RETICULAR FORMATION TO DORSAL HORN AND INFLUENCE SYNAPSE OF PAIN PATHWAY- III OF PAINS CONTROL PATHWAY – DESCENdING – BS TO SC – CLOSE GATE AND NOT LET PAIN SIGNALS COME THROUGHB. TO LATERAL HORN – NEURONS FROM BS TO LATERAL HORNS OF SC – AUTONOMIC CONRTOL/ VISCERAL CONTROL – CONTROL FROM PONS AND MEDULLA DOWN TO SC – INFLUENCE PERIPHERAL AUTONOMIC NEURONS

C. TO VENTRAL HORN – CELL BODIES OF LMN – SLIGHTLY DEPOLARIZES LMN AND LOWERS THRESHOLD TO ACTIVIATE NEURONS WITH LESS EFFORT TO FIGHT OR FLEE

Question 9

What circulation is the BS served by?

Answer 9

Posterior

Question 10

Which Cranial Nn get blood supply from the vertebral A?

Answer 10

IX, X, XI, XII

Question 11

Which Cranial Nn get blood supply from the basilarA?

Answer 11

V, VI, VII, VIII

Question 12

What Cranial Nn get there blood supply from the posterior cerebral?

Answer 12

POSTERIOR CEREBRAL – II, IV

Question 13

How would a pt present of they had damage to the R SC tract of BS?

Answer 13

contralateral

Question 14

What are the segments of the BS?

Answer 14

Cranial nn

Question 15

What happens of a cranial N is damaged?

Answer 15

Ipsilateral S&S

Question 16

What happens in the corticospinal tract if UMN is damaged?

Answer 16

Damage to UMN
Contralateral paresis (this pathway will cross at caudal border of medulla)

Question 17

What will be the presentation of ascending sensory pathways of Medial Lemniscus if there is damage?

Answer 17

Damage to ascending sensory pathway
Contralateral loss of discriminative touch and conscious proprioception (this pathway has already crossed at caudal border of medulla)

Question 18

What will be the presentation of damage to segments in BS ( Cranial Nn)

Answer 18

ipsilateral S & S

Question 19

Depict the side loss from these systems
vertical tracts for body
Cranial n Nuclei
cerebellum
autonomic

Answer 19

contralateral
ipsilateral
ipsilateral
ipsilateral

Question 20

Cranial Nn associated with dysphagia?

Answer 20

IX, and X

Question 21

Cranial Nn associated with dysarthria?

Answer 21

V, VII, X, XII

Question 22

Cranial Nn associated with Diploplia?

Answer 22

III, IV, VI

Question 23

What is Dymetria?

Answer 23

inability to hit a target

Cerebellum pathways disruption in BS