Iona And Actions, And Other Exam 3

Front 1

Masseter

Back 1

O: zygomatic arch
I: outer surface of ramus
INV: masseteric nerve
A: elevation and grinding (lateral movement)
BV: masseteric artery of second branch of maxillary a.

Front 2

Temporalis

Back 2

O: temporal fossa
I: coronoid process of mandible deep to zygomatic arch
INV: deep temporal nerve
A: anterior fibers – elevation of mandible; posterior fibers – retraction of mandible; (ipsilaterally) lateral movement of jaw
BV: deep temporal a. of second branch of maxillary a.

Front 3

Medial pterygoid

Back 3

O: medial surface of lateral pterygoid plate
I: medial surface of ramus
INV: nerve to medial pterygoid from mandibular nerve V3
A: (Contralaterally) lateral grinding movements and elevation of jaw
BV: pterygoid artery of second branch of maxillary a.

Front 4

Lateral pterygoid

Back 4

O: entire roof and medial wall of infratemporal fossa
I: anterior part of the neck of the mandible and articular disc of TMJ
INV: anterior division of mandibular nerve V3
A: protraction and depression of jaw
BV: pterygoid artery of second branch of maxillary a.

Front 5

Sphincter papillae

Back 5

INV: parasympathetic nerve fibers of CN III
A: contraction of pupil
(circular orientation around the iris)

Front 6

Dilator papillae

Back 6

INV: sympathetic motor fibers of carotid plexus
A: expansion of pupil (radial orientation around the iris)

Front 7

Superior rectus

Back 7

INV: CN III – oculomotor nerve
A: primary elevator of eye

Front 8

Lateral rectus

Back 8

INV: CN VI – abducens nerve
A: primary abductor

Front 9

Medial rectus

Back 9

INV: CN III- oculomotor nerve
A: primary adductor of eye

Front 10

Inferior rectus

Back 10

INV: CN III – oculomotor nerve
A: primary depressor of eye

Front 11

Superior oblique

Back 11

INV: CN IV – trochlear nerve
A: depresses and abducts eye

Front 12

Inferior oblique

Back 12

INV: CN III oculomotor nerve
A: elevates and abducts eye

Front 13

Ciliary muscle

Back 13

INV: parasympathetic fibers of CN III – oculomotor nerve
A: Accommodation of lens

Front 14

Levator palpebrae superioris

Back 14

INV: skeletal fibers – CN III (oculomotor nerve)
A: elevates upper eyelid voluntarily

Front 15

Superior tarsal muscle

Back 15

INV: smooth fibers – carotid plexus – sympathetic
A: involuntary elevation of upper eyelid

Front 16

Tensor veli palatine

Back 16

INV: nerve to medial pterygoid?
A: tenses palate and opens mouth of the auditory tube during swallowing – changes tone of voice

Front 17

Anterior belly of digastric

Back 17

O: digastic fossa of mandible
I: intermediate tendon to body and greater horn of hyoid
INV: nerve to mylohyoid
A: depresses mandible against resistance; elevates and steadies hyoid during swallowing and speaking

Front 18

Mylohyoid

Back 18

O: mylohyoid line of mandible
I: mylohyoid raphe and body of hyoid
INV: nerve to mylohyoid
A: depresses mandible, elevates hyoid, floor of mouth and tongue during swallowing and speaking

Front 19

Genioglossus

Back 19

O: short tendon from superior part of mental spine of mandible
I: entire dorsum of tongue; body of hyoid
INV: CN XII - hypoglossal
A: depresses and protrudes tongue
BV: Lingual Artery

Front 20

Superior constrictor

Back 20

O: pterygoid hamulus, pterygomandibular raphe, posterior end of mylohyoid line of mandible and side of tongue
I: median raphe
INV: CN X – vagus nerve
A: constrict walls of pharynx during swallowing

Front 21

Middle constrictor

Back 21

O: stylohyoid ligament and greater and lesser horns of hyoid
I: median raphe
INV: CN X – vagus nerve
A: constrict walls of pharynx during swallowing

Front 22

Inferior constrictor

Back 22

O: oblique line of thyroid cartilage and side of cricoid cartilage
I: median raphe
INV: CN X – vagus nerve
A: thyropharyngeus – constrict walls of pharynx during swallowing ; cricopharyngeus – relaxes during swallowing, allowing food and fluid to enter the upper end of the esophagus

Front 23

thyropharyngeus –

Back 23

apart of the inferior constrictor; constrict walls of pharynx during swallowing

Front 24

cricopharyngeus –

Back 24

apart of the inferior constrictor; relaxes during swallowing, allowing food and fluid to enter the upper end of the esophagus

Front 25

External intercostal mm.

Back 25

O: lower border of rib
I: upper border of rib below
INV: Intercostal nn (Ventral Primary Rami of T1-T11)
A: elevation of ribs

Front 26

Interal intercostal mm.

Back 26

O: lower border of rib
I: upper border of rib below
INV: Intercostal nn (Ventral Primary Rami of T1-T11)
A: Depression of ribs

Front 27

Innermost intercostal mm.

Back 27

O: lower border of rib
I: upper border of rib below
INV: Intercostal nn (Ventral Primary Rami of T1-T11)
A: Depression of Ribs

Front 28

Transversus thoracis

Back 28

O: posterior half of body of sternum and xyphoid process
I: costochondral junction of ribs 3-6
INV: Intercostal nn (Ventral Primary Rami of T1-T11)
A: Depression of ribs

Front 29

tenses palate and opens mouth of the auditory tube during swallowing – changes tone of voice

Back 29

Tensor veli palatini

Front 30

Levator veli palatini

Back 30

INV: pharyngeal branch of vagus nerve ?
A: elevate palate during swallowing

Front 31

Palatoglossus

Back 31

INV: pharyngeal branch of vagus nerve ?
A: elevates posterior part of tongue

Front 32

Palatopharyngeus

Back 32

INV: pharyngeal branch of vagus nerve ?
A: tenses soft palate

Front 33

Uvular muscle

Back 33

INV: pharyngeal branch of vagus nerve ?
A: wipes posterior pharyngeal wall from side to side

Front 34

Hyoglossus

Back 34

INV: CN XII – hypoglossal nerve
A: depresses and retracts the tongue

Front 35

Styloglossus

Back 35

INV: CN XII – hypoglossal nerve
A: retracts and elevates tongue to create a trough

Front 36

Tensor tympani

Back 36

INV: CN V3 (trigeminal (mandibular branch)
A: dampen or attenuate vibrations of tympanic membrane

Front 37

Stapedius

Back 37

INV: CN VII
A: prevent excessive movement of stapedius ossicle

Front 38

remember the sensory branches of V3 (mandibular)

Back 38

B - Buccal n.
A - Auriculotemporal n.
I - Inferior Alveolar n.
L - Lingual n.

Front 39

anterior division of mandibular nerve (CN V3)

Back 39

mostly motor
1) masseteric nerve
2) deep temporal nerves (anterior and posterior)
3) buccal nerve (a sensory nerve)
4) lateral pterygoid nerve

Front 40

Posterior division of mandibular nerve (CN V3)

Back 40

mostly sensory
1) auriculotemporal nerve (a sensory nerve)
2) lingual nerve (a sensory nerve)
3) inferior alveolar nerve (a sensory nerve)
4) motor branch to mylohyoid and anterior belly of digastric muscles (mylohyoid nerve)

Front 41

if only the anterior fibers contract of the temporallis m contract?

Back 41

mandible will be elevated

Front 42

if only the posterior fibers contract of the temporallis m contract?

Back 42

mandible will be retracted, or move posterior.

Front 43

Protrusion of the mandible

Back 43

primarily by the lateral pterygoid.

Front 44

Retraction of the mandible?

Back 44

temporalis (horizontal fibers) posterior fiber

Front 45

Lateral movements (or grind, side to side) of the mandible

Back 45

- ipsilateral temporalis and masseter
- contralateral medial pterygoid.

Front 46

Mandibular elevation

Back 46

- temporalis (vertical fibers)
- masseter
- medial pterygoid muscles.

Front 47

Depression of the mandible

Back 47

- gravity
- anterior belly of digastric
- mylohyoid
- lateral pterygoid muscles

Front 48

Constriction of pupil

Back 48

Sphincter pupillae muscle (parasympathetic motor fibers supplied by CN III)

Front 49

Dilation of pupil

Back 49

Dilator pupillae muscle (postganglionic sympathetic motor fibers supplied by the carotid plexus)

Front 50

maxillary artery is divided into three parts?

Back 50

- first and third parts pass through bony canals, while the branches of the
- second part supply the muscles of mastication and the buccinator muscle.
- Provides perfusion to all muscles of mastication and upper and lower jaw (sup. and inf. Alveolar a.)

Front 51

Ptosis

Back 51

drooping or falling of the upper or lower eyelid

Front 52

Muscles involved with swallowing

Back 52

1) Superior constrictor (constrict walls of pharynx)
2) Middle constrictor (constrict walls of pharynx)
3) Inferior constrictor:
thyropharyngeus – constrict walls of pharynx
cricopharyngeus – relaxes during swallowing
4) Tensor veli palatini: tenses palate/opens mouth of the auditory tube
5) Levator veli palatini: elevate palate
6) Anterior belly of digastric: elevates and steadies hyoid
6.) Mylohyoid: depresses mandible, elevates hyoid, floor of mouth and tongue

Front 53

CN X – vagus nerve innervates which muscles?

Back 53

1) all constrictor muscles
2) Hyoglossus
3) Styloglossus

Front 54

nerve to mylohyoid

Back 54

1) Anterior belly of digastric
2) mylohyoid

Front 55

median raphe

Back 55

insertion point for all constrictor muscles

Front 56

glossopharyngeal nerve (CN IX)

Back 56

1) Auricle (pinna)