*6.1 Systems in the NS, Sensory I - VISUAL SYSTEM and upper cranial nerves (HARC)

Question 1

OPTIC NERVE RECEIVES SENSORY INFORMATION from the EYE and takes it TO the…

Answer 1

OPTIC CHIASMA

-> OPTIC TRACT

Question 2

from the Optic Chiasma the OPTIC TRACT will take the Information TO … and where will it go from there

OPTIC TRACT ->

Answer 2

to LATERAL GENICULATE BODY (THALAMUS)

-> OPTIC RADIATION

and then to the OCCIPITAL LOBE

Question 3

what FEILDS of VIEW are RECEIVED at the EYES

Answer 3

TEMPORO VISUAL FIELD - LATERAL

NASAL VISUAL FIELD - MIDDLE

Question 4

at the OPTIC CHIASMA the information either DECUSSATES (crosses over and forms X shape) or some stays IPSILATERAL (on the same side)

which FIELDS of VIEW INFORMATION DECUSSATE and which stay IPSILATERAL

Answer 4

DECUSSATES : LATERAL, TEMPORO VISUAL FIELD

IPSILATERAL: MIDDLE, NASAL VISUAL FIELD

Question 5

where does OCCULOMOTOR NERVE ORIGINATE

Answer 5

VENTRAL MIDBRAIN

Question 6

OCCULOMOTOR NERVE is at the LEVEL of the …. (anatomical landmark)

Answer 6

SUPERIOR COLLICULUS

Question 7

The SUPERIOR BRANCH of the OCCULOMOTOR SUPPLIES which MUSCLES

Answer 7

SUPERIOR RECTUS & LEVATOR PALPEBRAE SUPERIOSIS

Question 8

INFERIOR BRANCH of the OCCULMOTOR SUPPLIES which MUSCLES

Answer 8

INFERIOR RECTUS, MEDIAL RECTUS, INFERIOR OBLIQUE

Question 9

OCCULOMOTOR SUPERIOR and INFERIOR BRANCHES supply how many MUSCLES each

Answer 9

Superior : 2

Inferior: 3

Question 10

TROCHLEAR NERVE (4) is at the LEVEL of the …

Answer 10

INFERIOR COLLICULUS (in LOWER MIDBRAIN)

Question 11

TROCHLEAR NERVE EXITS which way (ventral or dorsal)

Answer 11

DORSALLY - POSTERIOR

Question 12

TROCHLEAR NERVE INNERVATES which MUSCLE (MOTOR)

Answer 12

SUPERIOR OBLIQUE
(depression of eye)

Question 13

where is the ABDUCENS NERVE (6) LOCATED

Answer 13

at INFERIOR portion of the PONS

at PONTOMEDULLARY JUNCTION

Question 14

ABDUCENS NERVE has only SOMATIC MOTOR Neurons to INNERVATE which MUSCLE

Answer 14

LATERAL RECTUS MUSCLE
(abduction)

Question 15

LAVATOR PALPEBRAE SUPERIORIS (elevate eyelid) is INNERVATED by which NERVE

Answer 15

OCCULOMOTOR
- SUPERIOR BRANCH

Question 16

SUPERIOR OBLIQUE (depress eyeball, medial rotation, abduction) is INNERVATED by which NERVE

Answer 16

TROCHLEAR NERVE

(its Fibres pass the TROCHLEAR)

Question 17

INTERNAL OBLIQUE (elevate eyeball, lateral rotation, abduction) is INNERVATED by which NERVE

Answer 17

OCCULOMOTOR (3)
- INFERIOR BRANCH

Question 18

what is at the LEVEL of the SUPERIOR COLLICULUS

Answer 18

OCCULOMOTOR NERVE

Question 19

what is at the LEVEL of the INFERIOR COLLICULUS

Answer 19

TROCHLEAR NERVE

Question 20

what is at the PONTOMEDULLARY JUNCTION

Answer 20

ABDUCENS NERVE

(& Vestibulocochlear
& Facial)

Question 21

MEDIAL RECTUS (adduction) is INNERVATED by which NERVE

Answer 21

OCCULOMOTOR
- INFERIOR BRANCH

Question 22

LATERAL RECTUS (abduction) is INNERVATED by which NERVE

Answer 22

ABDUCENS

Question 23

INFERIOR RECTUS (depress eye) is INNERVATED by which NERVE

Answer 23

OCCULOMOTOR
- INFERIOR BRANCH

Question 24

which NERVE EXITS DORSALLY

Answer 24

TROCHLEAR NERVE

Question 25

which NERVE has ONLY SOMATIC MOTOR NEURONS (VOLUNTARY movement)

Answer 25

ABDUCENS

Question 26

which MUSCLES FIBRES PASS the TROCHLEAR

Answer 26

SUPERIOR OBLIQUE (from trochlear nerve)

Question 27

which MUSCLE appears the HIGHEST / most superior

Answer 27

SUPERIOR OLIQUE then Lavator Palpebrae Superiosis then Superior Rectus below

Question 28

the 4 RECTI MUSCLES ORIGINATE from .... RING

Answer 28

COMMON TENDONOUS RING

Question 29

FUNCTIONS of the SUPERIOR RECTUS muscle (innervated by OCCULOMOTOR)

Answer 29

ELEVATES EYES (look up) MEDIAL ROTATION/INTORSION ADDUCTION (pulls towards midline)

Question 30

FUNCTIONS of the INFERIOR RECTUS muscle (innervated by OCCULOMOTOR)

Answer 30

DEPRESSES EYES (look down) LATERAL ROTATION / INTORSION ADDUCTION

Question 31

FUNCTIONS of the MEDIAL RECTUS muscle (innervated by OCCULOMOTOR)

Answer 31

ADDUCTION

Question 32

FUNCTIONS of the LATERAL RECTUS muscle (innervated by ABDUCENS)

Answer 32

ABDUCTION

Question 33

FUNCTIONS of the SUPERIOR OBLIQUE muscle (innervated by TROCHLEAR)

Answer 33

DEPRESSION ABDUCTION MEDIAL ROTATION/INTORSION

Question 34

FUNCTIONS of the INFERIOR OBLIQUE muscle (innervated by OCCULOMOTOR)

Answer 34

ELEVATE ABDUCTION LATERAL ROTATION/EXTORSION

Question 35

which EYE MUSCLES cause ADDUCTION

Answer 35

MEDIAL RECTUS SUPERIOR RECTUS INFERIOR RECTUS

Question 36

which EYE MUSCLES cause ABDUCTION

Answer 36

LATERAL RECTUS SUPERIOR OBLIQUE INFERIOR OBLIQUE

Question 37

which MUSCLE ELEVATES the EYELID (not eye)

Answer 37

LEVATOR PALPEBRAE SUPERIOSIS (from superior branch of Occulomotor)

Question 38

which EYE MUSCLES cause ELEVATION of EYES - LOOK UP

Answer 38

SUPERIOR RECTUS INFERIOR OBLQUE

Question 39

which EYE MUSCLES cause DEPRESSION of EYES - LOOK DOWN

Answer 39

INFERIOR RECTUS SUPERIOR OBLIQUE

Question 40

which EYE MUSCLES cause MEDIAL ROTATION / INTORSION

Answer 40

SUPERIOR RECTUS SUPERIOR OBLIQUE (NOT medial rectus)

Question 41

which EYE MUSCLES cause LATERAL ROTATION / EXTORSION

Answer 41

INFERIOR RECTUS INFERIOR OBLIQUE (NOT lateral rectus)

Question 42

COMMON ACTION between the SUPERIOR and INFERIOR OBLIQUES

Answer 42

ABDUCTION

Question 43

COMMON ACTION between the SUPERIOR and INFERIOR RECTUS

Answer 43

ADDUCTION

Question 44

what ROTATION does SUPERIOR OBLIQUE cause

Answer 44

MEDIAL ROTATION / INTORSION (&abduct)

Question 45

what ROTATION does INFERIOR OBLIQUE cause

Answer 45

LATERAL ROTATION / EXTORSION (&abduct)

Question 46

what ROTATION does SUPERIOR RECTUS cause

Answer 46

MEDIAL ROTATION / INTORSION (&adduct)

Question 47

what ROTATION does INFERIOR RECTUS cause

Answer 47

LATERAL ROTATION / EXTORSION

Question 48

where in the BRAIN are the PRIMARY & SECONDARY VISUAL CORTEX where the sensory information from the optic nerve (optic chiasm, optic tract, optic radiation) is carried to FROM THE EYE

Answer 48

OCCIPITAL LOBE