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112 Cards in this Set
- Front
- Back
Each Muscle has how many ends? |
2 |
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What are the 2 ends of a muscle? |
Origin Insertion |
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Where does muscles receive blood from where? |
Nearby Arteries |
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Muscles are divided into how many groups? |
6 |
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What are the 3 groups of muscles we need to know |
Cervical Muscles of facial expressions Muscles of Mastication |
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CERVICAL MUSCLES |
........ |
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What are the 2 cervical muscles? |
Sternocleidomastoid (SCM) Trapezius |
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Cervical muscles are what? |
Superficial Can be palpated |
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The Sternocleidomastoid is what? |
The largest and most superficial |
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The Sternocleidomastoid muscles divides what? |
neck into anterior and posterior cervical triangles |
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What is the Sternocleidomastoid muscles origin? |
Medial part of clavicle and the sternum's superior and lateral surfaces |
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What is the Sternocleidomastoid Insertion? |
Just posterior and inferior to external acoustic meatus of each ear |
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What is the action of one pair of the Sternocleidomastoid muscle? |
The head and neck bend to the ipsilateral side |
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If both pairs of the Sternocleidomastoid muscle contracts what happens? |
The head will flex at the neck and extend at the junction between the neck and skull |
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Trapezius is what? |
Superficial to both lateral and posterior surfaces of the neck |
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What is he Origin of the Trapezius muscle? |
External surface of the occipital bone and the posterior midline of the cervical and thoracic regions |
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What is the insertion of the Trapezius muscle? |
Lateral third of the clavicle and parts of the Scapula |
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What is the action of the Trapezius muscle? |
When shoulders are shrugged |
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MUSCLES OF THE FACIAL EXPRESSIONS |
.................. |
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Muscles of the facial expressions are what? |
Paired muscles |
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All muscles of the facial expression originate from where? |
surface of the skull bone |
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All muscles of the facial expressions insert where? |
Of the Dermis of the Skin |
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When the muscles of the facial expression contracts what does it do to the skin? |
Skin moves causing wrinkles |
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All muscles of the facial expression are innervated by the what? |
Seventh cranial or facial nerve |
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Epricanial has how many bellies? |
2 |
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What are the Epricanial muscles bellies? |
Frontal Occipital |
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What is the origin for the frontal belly? |
Epicranial aponeurosis |
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What is the origin of the occiptal belly |
Occipital and temporal bone |
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What is the insertion for the frontal belly? |
Eyebrow and root of nose |
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What is the insertion for the occipital belly? |
Epicranial aponeurosis |
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What is the action of the Epicranial muscle? |
Raise eyebrows and scalp |
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ORBICULARIS OCULI |
......... |
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What is the Origin of the ORBICULARIS OCULI? |
Oribital rim frontal bone maxilla |
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What is the insertion of the Orbicularis Oculi |
Lateral canthus area Some encircle eye |
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What is the action for the Orbicularis Oculi? |
Close eyelids |
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CORRUGATOR SUPERCILII |
.................. |
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What is the Origin of the Corrugator Supercilii |
Frontal Bone |
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What is the insertion for Corrugator Supercilii? |
Skin of the eyebrow |
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What is the action for Corrugator Supercilii |
Draws skin medially and inferiorly toward the nose, "Frowning" |
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ORBICULARIS ORIS |
......... |
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What is the Origin of the Orbicularis Oris? |
Encircles mouth |
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What is the Insertion of the Orbicularis Oris? |
Labial commisure |
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What is the action for the Orbicularis Oris? |
Close lips, Pursing lips Grimacing Pouting kissing |
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The Buccinator muscle has what Origin? |
Maxilla Mandible and Pterygomandibular raphe |
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What is the insertion for Buccinator? |
Labial Commissure |
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What is the Action for the Buccinator? |
Compresses Cheek |
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Risorius has what Origin? |
Fascia superficial to masseter muscle |
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What is the Insertion for the Risorius? |
Labial Commisure |
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What is the action for the Risorius? |
Stretch lips and widen the mouth Grin or Fake smile |
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What is the Origin of the Levator Labii Superioris? |
Maxilla |
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What is the insertion for the Levator Labii Superioris? |
Upper Lip |
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What is the action for the Levator Labii Superioris? |
Elevates upper lip |
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What is the Origin of the Levator Labii Superioris Alaeque Nasi? |
Maxilla |
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What is the insertion of the Levator Labii Superioris |
Ala of nose and upper lip |
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What is the action of the Levator Labii Superioris Alaeque |
Elevates the upper lip and ala of nose, (sneering expression) |
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Zygomaticus Major has what Origin? |
Zygomatic bone |
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What is the insertion of the Zygomaticus Major? |
Labial Commissure |
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What is the action for the Zygomaticus Major? |
Elevates labial commissures of upper lip and pulls laterally "smile" |
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ZYGOMATICUS MINOR |
.......... |
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What is the Origin of the Zygomatic minor? |
Zygomatic Bone |
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What is the insertion of the Zygomaticus Minor? |
Upper Lip |
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What is the action of the Zygomaticus Minor? |
Elevates upper lip assisting in smiling |
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LEVATOR ANGULI ORIS |
.......... |
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What is the Origin of the Levator Anguli Oris? |
Maxilla |
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What is the insertion for the Levator Anguli Oris? |
Labial Commissure |
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What is the action for the Levator Anguli Oris? |
Elevates labial commsissure "smile" |
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ANGULI ORIS |
............. |
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What is the Origin of the Depressor Anguli Oris? |
Mandible |
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What is the insertion for the Depressor Anguli Oris? |
Labial Commissure |
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What is the action for Depressor Anguli Oris? |
Depresses labial commissure "Frowns" |
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DEPRESSOR LABII INFERIORIS |
................ |
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What is the origin of the depressor Labii Inferioris? |
Mandible |
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What is the insertion for the Depressor Labii Inferioris? |
Lower Lip |
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What is the action for Depressor Labii Inferioris? |
Depresses lower lip, Exposing mandibular incisors "irony" |
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MENTALIS |
.......... |
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What is the Origin of the Mentalis? |
Mandible |
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What is the Insertion of the Mentalis? |
Chin |
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What is the action of the Mentalis? |
Raises the chin Wrinkles the skin |
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PLATYSMA |
........... |
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What is the origin of the Platysma? |
Clavicle and Shoulder |
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What is the Insertion for the Platysma? |
Mandible and muscles of mouth |
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What is the action of the Platysma? |
Raises skin of neck pulls the labial commisure down "grimace" |
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MUSCLES OF MASTICATION |
..................... |
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Muscles of Mastication are what? |
Four pairs of muscle attached to the mandible |
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What are the the four pairs of muscles of mastication? |
Masseter Temporalis Medial Pterygoid Lateral pterygoid muscles |
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All of the muscles of mastication are innervated by what? |
5th cranial or Trigeminal nerve |
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Masseter has how many heads? |
2 |
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What are the 2 heads of the masseter? |
Superficial and Deep |
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What is the origin of the superficial head? |
Anterior 2/3 of the lower border of the zygomatic arch
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What is the origin of the deep head of the masseter? |
Posterior 1/3 and medial surface of the zygomatic arch |
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What is the insertion of the Superficial head? |
Angle of the mandible |
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What is the insertion of the deep head of the Masseter? |
Ramus of the mandible |
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what is the action of the Masseter muscle? |
Elevation of the mandible |
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TEMPORALIS |
............ |
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What is the origin of the Temporalis muscle? |
Temporal Fossa on temporal bone |
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What is the insertion of the Temporalis? |
Coronoid Process and ramus of mandible |
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What is the action of the Temporalis? |
Elevation of the mandible Retraction of mandible |
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MEDIAL PTERYGOID |
............ |
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How many heads does the medial pterygoid have? |
2 |
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What are the two heads of the medial pterygoid muscle? |
Deep and Superficial |
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What is the origin of the deep head? |
Lateral pterygoid plate of the Spenoid bone |
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What is the origin of the superficial head of the medial pterygoid |
Maxillary tuberosity of maxilla |
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What is the insertion of the medial ptyergoid muscle? |
Medial surface of the Ramus and angle of the mandible |
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What is the action of the medial pterygoid muscle |
Elevation of mandible |
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LATERAL PTERYGOID MUSCLE |
................. |
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How many heads Does the lateral pterygoid muscle have? |
2 |
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What are the names of the head of the lateral pterygoid muscle? |
Superior Inferior |
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What is the Origin of the superior head? |
Greater Wing of sphenoid bone |
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What is the origin of the inferior head of the lateral pterygoid muscle? |
Lateral pterygoid plate of the sphenoid bone |
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What is the insertion of the superior head |
Pterygoid fovea of mandible |
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What is the insertion of the inferior head? |
Temporomandibular joint disk and capsule |
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What is the action of the lateral pterygoid muscle? |
Both muscles protrude the mandible
Inferior head: depresses the mandible |