Orofacial Anatomy Test 2 (Muscular and TMJ): – Questions
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Terms in this set (88)
Sternocleidomastoid Muscle SCM divides the neck region into anterior and posterior triangles,
helps define location of structures such as the lymph nodes
for head and neck
all the muscles of facial expression are seventh cranial or facial nerve
innervated by which nerve?
first sign of damage to 7th cranial or facial an inability to form facial expressions on one side of face
nerve
nerve damage results in facial paralysis of facial expression on the involved side
Facial paralysis can occur with what things? 1. stroke or cerebrovascular accident
2. Bell palsy
3. parotid salivary gland cancer - because 7th cranial nerve
travels through the gland2
Epicranial muscle has two bellies, the frontal belly and the occipital belly
Epicranial muscle action: Both bellies of the muscle raise the eyebrows and scalp as
when a person shows surprise2
Epicranial muscle origin - Frontal belly/frontalis muscle: epicranial aponeurosis.
- Occipital belly/occipitalis muscle: occipital and temporal
bones.
Epicranial muscle insertion - Frontal belly: eyebrow and root of nose
- Occipital belly: epicranial aponeurosis
Orbicularis Oculi
, Buccinator Muscle origin and insertion muscle originates from 3 areas:
- alveolar process of maxilla (as far as the maxillary first molar)
- alveolar process of mandible
pterygomandibular raphe
Risorius muscle Muscle of the mouth that stretches the lips laterally to retract
labial commissure and widen the mouth, creating a grimace.
Levator labii superioris alaeque nasi muscle: elevates the upper lip and ala of nose, dilating each naris.
action creates a sneer facial expression - the Elvis muscle
Levator labii superioris alaeque nasi muscle
location
depressor anguli oris muscle means "depressor of the angle of mouth muscle"
depressor anguli oris muscle origin: the inferior border of mandible
depressor anguli oris muscle insertion: the skin at the ipsilateral labial commissure at the facial
modiolus
depressor anguli oris muscle location
depressor anguli oris muscle action depresses the labial commissure, as when a person frowns
depressor labii inferioris muscle action: depresses the lower lip, exposing the mandibular incisors
Mentalis muscle - origin and insertion origin - on the anterior mandible near the midline
insertion - in the skin of the chin
depressor labii inferioris muscle location
mentalis muscle location
The muscles of mastication are _____ of four pairs
muscles that are located ____ within the face deeper
than the muscles of ______ facial expression
What are the 4 paired mastication muscles? masseter
temporalis
medial pterygoid
lateral pterygoid
With Accurate Solutions
Save
Students also studied
WSC 2026: Are we there yet? World Scholar's Cup set 2026 SS10 Nationalism
Teacher 156 terms 430 terms Teacher 25 terms
Amy_Woodall4 Preview alexandergumede Preview Alicia_Zents
Terms in this set (88)
Sternocleidomastoid Muscle SCM divides the neck region into anterior and posterior triangles,
helps define location of structures such as the lymph nodes
for head and neck
all the muscles of facial expression are seventh cranial or facial nerve
innervated by which nerve?
first sign of damage to 7th cranial or facial an inability to form facial expressions on one side of face
nerve
nerve damage results in facial paralysis of facial expression on the involved side
Facial paralysis can occur with what things? 1. stroke or cerebrovascular accident
2. Bell palsy
3. parotid salivary gland cancer - because 7th cranial nerve
travels through the gland2
Epicranial muscle has two bellies, the frontal belly and the occipital belly
Epicranial muscle action: Both bellies of the muscle raise the eyebrows and scalp as
when a person shows surprise2
Epicranial muscle origin - Frontal belly/frontalis muscle: epicranial aponeurosis.
- Occipital belly/occipitalis muscle: occipital and temporal
bones.
Epicranial muscle insertion - Frontal belly: eyebrow and root of nose
- Occipital belly: epicranial aponeurosis
Orbicularis Oculi
, Buccinator Muscle origin and insertion muscle originates from 3 areas:
- alveolar process of maxilla (as far as the maxillary first molar)
- alveolar process of mandible
pterygomandibular raphe
Risorius muscle Muscle of the mouth that stretches the lips laterally to retract
labial commissure and widen the mouth, creating a grimace.
Levator labii superioris alaeque nasi muscle: elevates the upper lip and ala of nose, dilating each naris.
action creates a sneer facial expression - the Elvis muscle
Levator labii superioris alaeque nasi muscle
location
depressor anguli oris muscle means "depressor of the angle of mouth muscle"
depressor anguli oris muscle origin: the inferior border of mandible
depressor anguli oris muscle insertion: the skin at the ipsilateral labial commissure at the facial
modiolus
depressor anguli oris muscle location
depressor anguli oris muscle action depresses the labial commissure, as when a person frowns
depressor labii inferioris muscle action: depresses the lower lip, exposing the mandibular incisors
Mentalis muscle - origin and insertion origin - on the anterior mandible near the midline
insertion - in the skin of the chin
depressor labii inferioris muscle location
mentalis muscle location
The muscles of mastication are _____ of four pairs
muscles that are located ____ within the face deeper
than the muscles of ______ facial expression
What are the 4 paired mastication muscles? masseter
temporalis
medial pterygoid
lateral pterygoid
