Skull, Cranium, intro to Eyes

Question 1

the skull develops from

Answer 1

–ectoderm (neural crest cells in viscerocranium)
–mesoderm (partial, neurocranium)

Question 2

what surrounds the pituitary stalk?

Answer 2

diaphragama stelle

Question 3

where does the Dural venous sinus receive blood?

Answer 3

brain (from cerebral veins)
extracranial veins (from scalp)

Question 3

what is the order of the venous sinuses starting with superior sagittal sinus?

Answer 3

superior sagittal sinus
interior sagittal sinus
straight sinus
confluence
transverse
sigmoid
internal jugular vein

Question 3

the Dural venous sinuses are between:

Answer 3

periosteal and meningeal layer

Question 4

what is the first cranial nerve? what does it do?

Answer 4

olfactory (smell)

Question 4

what passes through the superior orbital fissure?

Answer 4

CN III, CN IV, CN VI (and V1)

Question 4

what is the second cranial nerve? what does it allow?

Answer 4

optic nerve, vision

Question 4

what is the most important anastomoses in the body?

Answer 4

circle of willis

Question 5

what is the basilar artery?

Answer 5

where the left and right vertebral arteries converge

Question 6

what nerves run through the eye?

Answer 6

optic, supraorbital V1, lacrimal V1, CN VI, CN IV, CNIII, supratrochlear, nasocilliary

Question 7

what runs through each of the three openings of the eye?

Answer 7

SOF: V1
For. rotundum: V2
For. ovale: V3
(Standing Room Only)

Question 7

what does the ophthalmic or V1 division do?

Answer 7

sensory:
forehead and scalp
globe
nasal mucosa

Question 8

what does the maxillary V2 division do?

Answer 8

sensory:
* Skin overlying maxilla
* Upper lip
* Maxillary teeth and
sinuses
* Palate
(comes out infraorbital fissure)

Question 8

what does the facial nerve motor innervate?

Answer 8

muscles of expression
stapedius

Question 9

what does the mandibular V3 do?

Answer 9

– Sensory
* Skin overlying mandible
* Floor of mouth
* Mandibular teeth
* Anterior tongue
– Motor
* Muscles of mastication
* Tensor tympani m

Question 10

the facial nerve exits the skull where?

Answer 10

internal acoustic meatus

Question 11

what does the facial nerve innervate sensory?

Answer 11

taste for anterior 2/3 tongue

Question 12

what are the branches of the facial nerve?

Answer 12

temporal
zygomatic
buccal
mandibular
cervical

Question 13

what is CNVIII?

Answer 13

vestibulocochlear

Question 14

where is CNVIII and what does it do?

Answer 14

petrous portion of temporal bone
balance/equilibrium
hearing

Question 15

what is CN IX?

Answer 15

glossopharyngeal

Question 16

what is the sensory innervation of CN IX?

Answer 16

muscosa: tympanic caviry, Eustachian tube, upper pharynx
chemo and baroreceptor
post 1/3 tongue

Question 17

CN IX does what sensation for the tongue?

Answer 17

taste and somatic sensation

Question 18

what is cn x?

Answer 18

vagus

Question 19

what is the motor innervation provided by cn X?

Answer 19

– Pharyngeal constrictors
– Laryngeal mm
(helps swollow)

Question 20

what is the sensory innervation for vagus?

Answer 20

epiglottis (taste and sensation)

Question 21

what para sympathetic innervation does cn x do?

Answer 21

– Thoracic & abdominal viscera
* Smooth muscle
* Glands

Question 22

what does CN XI do?

Answer 22

motor for SCM and Trap

Question 23

CN XII exits the skull where?

Answer 23

hypoglossal canal

Question 24

what is the function of CN XII?

Answer 24

tongue muscles *except palatoglossus