Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
what is the innervation to all these muscles?
|
CN VII - the facial nerve
|
|
|
|
origin and insertion of all the facial muscles?
|
o. fascia and/or bone
i. skin |
|
|
|
Frontalis
(connected to the occipitalis by epicranial apponeurosis called the galae aponeurotica) |
a. raises the brow and wrinkles the forehead as in surprise. It produces transverse wrinkles in the forehead when frowning.
|
(connected to the occipitalis by epicranial apponeurosis called the galae aponeurotica)
|
|
|
Occipitalis
(connected to the frontalis by epicranial apponeurosis called the galae aponeurotica) |
a. wrinkles the skin over the occipital bone
|
|
|
|
Orbicularis oculi
|
a. sphincter of the eye - closes the lid, compresses the lacrimal gland
|
|
|
|
Corrugator supercilii
|
a. draws the eyebrows downward and medially as in frowning and suffering.
|
|
|
|
Procerus
|
Draws the medial angle of the eyebrow downward producing transverse wrinkles over the bridge of the nose.
|
|
|
|
Nasalis:
1. Compressor nares (transverse portion) 2. Dilator nares (alar portion) |
1. Compresses the anterior nasal aperture/nostril
2. Widens the anterior nasal aperture/nostril |
|
|
|
Depressor septi
|
assists the dilator nares in widening the nasal aperture during deep inspiration
|
|
|
|
Levator labii superioris
|
raises the upper lip carrying it slightly forward (evert)
|
|
|
|
Levator labii superioris alaeque nasi
|
medial portion of the LLS muscle.
o. near the procerus i. into the alar portion of the nostril a. dilates the nostril |
|
|
|
Zygomaticus minor
|
elevates the upper lip and also produces the nasolabial furrow (sorrow or contempt)
|
|
|
|
Zygomaticus major
|
draws the angle of the mouth upward and laterally during smiling
|
|
|
|
Levator anguli oris, aka Caninus
|
raises the angle of the mouth as in sneering and is instrumental in producing the nasolabial furrow which deepens in contempt or disdain
|
|
|
|
Buccinator
|
compresses the cheeks helping to hold food in the proper place in the mouth when eating, compresses the cheek when blowing out air
|
|
|
|
Risorius
|
Retracts the angle of the mouth producing a sardonic (cynical/scornful) expression.
|
|
|
|
Orbicularis oris
|
direct closure of lips, applies the lips to the alveolar arch, brings the lips together and protrudes them (purses the lips) as in whistling and sucking
|
|
|
|
Depressor anguli oris, aka triangularis
|
depresses the corner of the mouth as in sadness
|
|
|
|
Depressor labii inferioris
|
draws the lower lip down and lateral as in chewing. Also contributes to an expression of irony.
|
|
|
|
Mentalis
|
Raises and protrudes the lower lip, wrinkles the skin of the chin as in pouting, or expressing doubt or disdain (despise)
|
|
|
|
Platysma
(Only muscle of ant neck innervated by Facial n. - CN VII) |
retracts and depresses the corner of the mouth. tenses the skin of the ant neck.
|
|
