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t2-ra-pwel
T2-RA-PWEL
| Question | Answer |
|---|---|
| Occipitofrontalis | epicranius |
| Orbicularis oris | puckering muscle |
| Zygomaticus major | laughing muscle |
| purpose of muscular system | covers, shapes, and supports the skeleton. |
| muscular system function is to | produce all movement of the body. |
| muscular system for the entire body consists of | 500 muscles |
| ratio of muscular system to body weight | 40% to 50% |
| muscles that influence surface forms and expressions | cranium, face, and neck muscles |
| draws scalp posteriorly and anteriorly; raise and wrinkles eyebrows | Occipitofrontalis |
| form on forehead | Occipitofrontalis; (epicranius) |
| broad muscle covers top of skull | Occipitofrontalis; occipitalis, back part; frontalis, front.part |
| muscle of mastication; strongest chewing muscle | Temporalis |
| closes & assists side-to-side movement of mandible. | Temporalis |
| broad muscle arising temporal cavity and inserting in mandible. | Temporalis |
| muscle of mastication; closes the mandible. | Masseter |
| arising zygomatic arch; inserting in mandible. | Masseter |
| Closes eyelid;compresses lacrimal sac. | Orbicularis oculi |
| sphincter muscle surrounds the eye socket. | Orbicularis oculi |
| Draws eyebrows inferiorly and medially, as in frowning. | Corrugator |
| pyramid-shaped muscle of facial expression | Corrugator |
| muscle beneath frontalis and orbicularis oculi; for frowning | Corrugator |
| Raises upper eyelid. | Levator palpebrae superioris |
| muscle of facial expression; from inside eye socket to superior tarsal plate of eyelid. | Levator palpebrae superioris |
| Draws skin of forehead inferiorly; transverse and vertical wrinkles forehead. | Procerus |
| muscle covering bridge of nose. | Procerus |
| closes & compress lips against teeth; Shape lips during speech. | Orbicularis oris |
| flat band muscles; in upper and lower red lips and integumentary lips. | Orbicularis oris |
| Raises upper lip; dilates nostrils. | Levator labii superioris alaeque nasi |
| muscle of facial expression. | Levator labii superioris alaeque nasi |
| Elevates and extends the upper lip. | Levator labii superioris |
| muscle of facial expression. | Levator labii superioris |
| Elevates angle of mouth. | Levator anguli oris |
| small muscle @ angle of mouth. | Levator anguli oris |
| draws upper lip superiorly and laterally. | Zygomaticus minor |
| Muscle of the face. | Zygomaticus minor |
| Draws upper lip posterior, superior, lateral; as smiling or laughing. | Zygomaticus major |
| Buccinator | trumpeters muscle |
| Risorius | false smile muscle |
| Depressor anguli oris | Triangularis |
| Stemocleiomastoid | SCM |
| Extends from cheekbone to angle of mouth. | Zygomaticus major; laughing muscle |
| Compress cheek; pulls anguli oris posteriorly; use for sucking. | Buccinator; trumpeters muscle |
| principle cheek muscle | buccinator |
| Originates molar skin; inserts into skin of anguli oris@ corners of mouth; makes up part of angulus oris eminences | buccintor |
| Depressor labii inferioris | Quadratus |
| Draws corners of mouth posteriorly. | Risorius; false smile muscle |
| Extends from skin over masseter to corners of mouth. | Risorius; false smile muscle |
| Depresses angle of mouth. | Depressor anguli oris; Triangularis |
| muscle of facial expression; arises from mandible; insert into anguli oris. | Depressor anguli oris ;Triangularis |
| Depresses the lower lip inferiorly and slightly laterally. | Depressor labii inferioris; Quadratus |
| muscle of facial expression. | Depressor labii inferioris; Quadratus |
| Elevates and protrudes lower lip; wrinkles skin over chin. | Mentalis |
| muscle located on tip of chin. | Mentalis |
| Wrinkles skin of neck and chest; depresses mandible and anguli oris, in pouting. | Platysma |
| Thin layer of muscle covering anterior neck. | Platysma |
| Rotates and depresses head. | Stemocleiomastoid; SCM |
| thick muscle; origin head of sterum & clavicle; insert mastoid process of temporal bone. | SCM |
| Draws the hyoid bone superiorly. | Digastric |
| double-bellied muscle of neck, attaches mastoid process and mandible. | Digastric |
| physical appearance of face is affected by | facial markings |
| wrinkles, depressions,& projections that us individual look | facial marking |
| facial markings are acquired | natural at birth, aging, environment, or lifestyle |
| if deceased individual is to look natural | facial markings in death must resemble facial markings in life. |
| Heredity | genetic make-up of our parents |
| Age | facial markings increase with age |
| facial factor of aging | atrophy, stretch skin, |
| main environmental factor that affects most people | exposure to sun |
| skin exposed to excessive sun light | darker complexion; more lines; firmer, reduced soft texture. |
| how do muscle striation affect facial marking | firmer muscle more work; soften and sag muscle less work. |
| positive gravity cause object to sag | downward |
| while standing erect; direction of positive gravity | inferior. |
| face up; lying on back; supine position; positive gravity cause sag to back | sag move posterior and lateral. |
| sudden weight loss before death | more wrinkles and facial sagging. |
| weight gained before death exhibit | fewer markings |
| highlights and shadows can be caused by | natural or directional light using spot or floodlights. |
| Highlight | surface right angle to illumination, reflects maximum light; the lighter and brighter part. |
| Shadow | Surfaces not @ right angles to illumination source; surface obscured by other surfaces; reflect little or no light. |
| The higher an area protrudes | the brighter the reflected light depressions create |
| highlights indicate | raised area or projection |
| shadows indicate | creases, grooves, and shallow depressions. |
| lighting on restoration should duplicate | lighting of photograph (Hughes, 1962)." |
| FACIAL PROFILES | silhouette of face from side view. |
| Convex profile | forehead recedes posteriorly from eyebrows; chin recedes from upper lip |
| most common facial profile | convex |
| Concave profile | forehead protrudes eyebrows; chin protrudes Infantine retrousse plane of upper lip |
| least common facial profile | concave |
| Vertical balanced | chin, forehead, upper lip all project to imaginary line no feature protrudes or recedes more than the other . |
| three basic linear forms serve as a basis for | six combination profiles Convex-concave |
| Concave-vertical | forehead protrudes beyond eyebrows; upper lip and chin project equally to an imaginary vertical line. |
| Concave-convex | forehead protrudes beyond eyebrows; chin recedes plane of upper lip. |
| Vertical-convex | forehead and eyebrow project equally to imaginary line; chin recedes less than superior mucous membrane. |
| Convex-vertical | forehead recede eyebrow; chin and upper lip project equally to vertical line. |
| what define the general characteristics of each head shape | Bone, cartilage, & facial tissue. |
| # basic shapes used to form head from frontal view | seven |
| ideal head shape | Oval |
| cheekbone wider than cranium; cranium slightly wider than lower jaw. | oval |
| entire face composed of soft, rounded curves. | oval |
| most common shape | Oval |
| Round | Short, full cheeks; full jawline; full cranium |
| Square | short, straight lines; forehead, jawline, cheeks same width; hairline straight. |
| Triangle | narrowest feature forehead; wider @ jawline not cheekbone or forehead; Eyes close set; |
| least common head shape | triangle |
| Inverted Triangle | Eyes wide-set; jawline narrower than cheekbone or forehead; forehead widest part of face; . |
| Diamond | wide cheekbones; narrow forehead & jawline. widest across cheekbone. |
| Oblong | Long & narrow, forehead and chin round or square; nose long. |