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Spinal > Exam 3: Face > Flashcards

Exam 3: Face Flashcards

1
Q

Unique about muscles of face

A

Do not act as lever muscles

Do not attach to bone at both origin and insertion

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2
Q

Which muscles lack any attachment to bone

A

Orbicularis oris
Processus
Risorius

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3
Q

What type of motor fibers to skeletal muscles are given off by facial nerve

A

Branchial efferent

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4
Q

Embryonic origin of skeletal muscles innervated by facial nerve

A

Branchial arches

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5
Q

Most of 7th CN will exit skull via

A

Stylomastoid foramen

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6
Q

Source of innervation for all muscles of facial expression

A

Facial nerve branches

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7
Q

Branchial efferent fibers carried in 7th CN innervate what muscles

A 
Muscles of facial expression 
Muscles of scalp and auricle 
Buccinator 
Platysma 
Stapedius 
Stylohyoid 
Posterior belly epicranius
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8
Q

Which divisions of trigeminal nerve contain somatic Afferent pathways

A

All three

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9
Q

Landmark forms apex of orbit

A

Convergence of SO fissure and IO fissure

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10
Q

Openings located along superior wall of orbit

A

Optic canal

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11
Q

Contents of optic canal

A

Optic nerve

Ophthalmic artery

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12
Q

Name given to medial wall of orbit

A

Lamina papyracea

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13
Q

Features observed on medial wall of orbit

A

Lacrimal groove
Fossa for lacrimal sac
Ant ethmoidal foramen
Post ethmoidal foramen

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14
Q

Openings located along lateral wall of orbit

A

SO fissure

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15
Q

Opening accommodates passage of ophthalmic nerve and ophthalmic veins between orbit and cranial vault

A

SO fissure

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16
Q

Openings located along inferior wall of orbit

A

IO fissure

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17
Q

Contained in IO fissure

A

Maxillary division trigeminal

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18
Q

Openings on each wall of orbit

A

Superior- optic canal
Medial - ant ethmoid and Post ethmoid foramen
Lateral- SO fissure
Inferior- IO fissure

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19
Q

Layers of eyelid

A

Skin
Orbicularis oculi
Tarsal plate
Palpebra conjunctiva

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20
Q

Names given to modified sebaceous gland in tarsus of eyelid

A

Tarsal or Meibomian gland

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21
Q

Function of meibomian gland

A

Produces thick, hydrophobic substance that prevents tears from overflowing onto cheeks along margin of eyelid

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22
Q

Name of gland located at base of eyelash

A

Ciliary gland

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23
Q

Names given to modified sebaceous glands of palpebra

A

Tarsal gland

Ciliary gland

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24
Q

Name of mucous membrane attaching to eyeball

A

Bulbar conjunctiva

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25
Q

Name given to blind sac formed between palpebral and bulbar conjunctiva

A

Sup and Inf fornix

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26
Q

Name given to angle formed between sup and Inf eyelids at medial and lateral margins

A

Canthus

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27
Q

Union of skin at eyelid margin

A

Medial or lateral palpebra commissure

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28
Q

Elevation at medial canthus

A

Lacrimal caruncle

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29
Q

Crescent shaped appearance of conjunctiva at medial canthus

A

Plica semilunaris conjunctiva

30
Q

Elevation at medial margin of eyelid

A

Sup or Inf lacrimal papilla

31
Q

Opening at lacrimal papilla

A

Lacrimal Punctum

32
Q

Location of lacrimal gland

A

Lacrimal fossa of frontal bone in superolateral part of orbital wall

33
Q

Drainage pattern of tears

A 
Lacrimal punctum
Lacrimal canaliculus
Lacrimal sac
Nasolacrimal duct 
Inferior nasal meatus
34
Q

How many neurons involved in visceral efferent pathways from CNS to target cell

A

2 motor neurons

35
Q

Location for 2nd neuron in visceral efferent pathway

A

Ganglion

36
Q

CN involved in VE PS pathway to lacrimal gland

A

Facial and trigeminal

37
Q

Names of ganglion of synapse in efferent pathway to lacrimal gland

A

Pterygopalatine ganglion
Sphenopalatine ganglion
Meckel’s ganglion

38
Q

PS stimulation of blood vessels in lacrimal gland will result in

A

Vasodilation of blood vessels
Increased availability of water to secretory units
Thinner or watery product in lumen

39
Q

S fibers synapse in which ganglion in pathway to lacrimal gland

A

Superior cervical ganglion

40
Q

S stimulation of lacrimal gland will result in what events

A

Vasoconstriction
Limited availability of water to secretly units
More viscous or thicker product formed in glandular lumen

41
Q

What cells of lacrimal gland will cause the product to be released from the secretory unit

A

Myoepithelial cells

42
Q

What will PS specifically target in lacrimal gland

A

Vasomotor fibers to smooth muscle of blood vessels

Secretomotor fibers to myoepithelial cells surrounding secretory alveolus

43
Q

PS stimulation of targets in lacrimal gland will result in what

A

Vasodilation of blood vessels
Increased water availability
Thinner watery product

Constriction of myoepithelial cells leading to release of product form secretory lumen into duct system

44
Q

Names of layers of eyeball

A

Fibrous tunic
Uveal tract
Retina

45
Q

Parts of fibrous tunic

A

Cornea and sclera

46
Q

Parts of uveal tract

A

Iris
Ciliary body
Choroid
Pupil

47
Q

Muscles present in iris

A

Sphincter pupillae

Dilator pupillae

48
Q

Innervation of sphincter pupillae

A

Oculomotor nerve, PS pathway

49
Q

Innervation of ciliaris muscle

A

Oculomotor nerve, PS pathway

50
Q

Function of rod cell

A

Provide vision in dim light conditions

51
Q

Function of cone cell

A

Provide vision in bright light conditions and mediate color vision

52
Q

What forms optic nerve

A

Axons of ganglion cells

53
Q

What occurs at optic chiasma

A

Part of optic nerve decussates

54
Q

Innervation of dilatator pupillae

A

Internal cardiac artery plexus

S pathway

55
Q

Chambers of eyeball in front of lens

A

Ant and Post chambers

56
Q

What separates ant chamber and post chamber

A

Iris

57
Q

What is contained in ant chamber

A

Aqueous humor

58
Q

Primary cause of glaucoma

A

Excess aqueous humor in chambers in front of lens

59
Q

Name given to chamber behind lens

A

Vitreous chamber

60
Q

Fills vitreous chamber

A

Vitreous body

61
Q

Functions of vitreous body

A

Maintain retinal curvature

Allow minimal light distortion from lens to retina

62
Q

Common characteristics in O and I of all rectus extraocular muscles

A

All O from common annular tendon in orbit

All I into sclera in front of coronal equator of eyeball

63
Q

Apparent function of medial rectus

A

Adducts cornea

64
Q

Apparent function of lateral rectus

A

Abducts cornea

65
Q

Which nerves innervate specific extrinsic/extraocular Muscles

A

Oculomotor
Trochlear
Abducent

66
Q

2 unique features of 4th CN

A

Only CN with apparent O from brain’s dorsal surface

Only C efferent N to decussate within midbrain from its nucleus

67
Q

Intrinsic muscles of eye innervated by which VE pathways

A

Ciliaris and sphincter pupillae innervated by PS

Dilator pupillae innervated by S

68
Q

Location of synapse for preganglionic PS efferent fibers of 3rd CN

A

Ciliary ganglion

69
Q

O for S pathway to dilator pupillae

A

Lateral horn T1, T2

70
Q

S fibers synapse in which ganglion in pathway to dilator pupillae

A

Sup cervical ganglion

71
Q

From sup cervical ganglion, how to S fibers reach dilator pupillae

A

Join internal carotid artery neurovascular plexus and continue along ophthalmic artery to central artery of retina and enter eyeball

Spinal (27 decks)

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