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45 Cards in this Set
- Front
- Back
What are the muscles of facial expression? |
1. Epicranius 2. Orbicularis Oculi 3. Orbicularis Oris 4. Zygomaticus Major 5. Depressor Anguli Oris 6. Buccinator 7. Platysma |
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What are the two muscles of the epicranius? |
1. Frontalis 2. Occipitalis |
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What else is the epicranius made of? |
an aponeurosis (galea aponeurotica) |
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What is the function of the frontalis? |
elevates eyebrows and wrinkles forehead |
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What is the function of the occipitalis? |
draws scalp backward |
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What is the orbicularis oculi? |
closes eye (wink) |
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What is the function of the orbicularis oris? |
closes and puckers lips (kiss) |
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What is the function of the zygomaticus major? |
elevates corner of mouth (smile) |
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What is the function of the depressor anguli oris? |
depresses corner of mouth (frown) |
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What is the function of the buccinator? |
pulls cheeks against teeth when chewing |
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What is the function of the platysma? |
tenses skin of neck, and depresses lower lip |
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What are the muscles of mastication? (chewing) |
A. Masseter B. Temporalis C. Medial and laterl Pterygoids |
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What is the function of the masseter? |
elevates mandible |
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What is the function of the temporalis? |
elevates and retracts mandible |
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What is the function of the medial and lateral pterygoids? |
elevates mandible and moves mandible side to side |
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What are the muscles of the tongue? (gloss=tongue) |
1. Genioglossus 2. Styloglossus 3. Hyoglossus |
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What is the function of the genioglossus? |
protracts (protrudes) and depresses tongue |
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What is the function of the styloglossus? |
retracts and elevates tongue |
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What is the function of the hyloglossus? |
depresses sides of tongue |
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What are the lateral neck muscle? |
sternocleidomastoid |
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What is the function of the sternocleidomastoid? |
each rotates head to one side; together - they flex the neck/head -right side rotates head to the left -left side rotates head to the right -flexing both sides and pulling your head down is neck flexion |
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What is the posterior neck muscle? |
splenius capitus (splenius=bandage) |
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What is the function of the splenius capitus? |
each rotates head to one side, together; extend the neck/head -left side rotates your head to the left -right side rotates your head to the right -these muscles bring your neck up from being flexed into being erect
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What are the suprahyoid muscles of the anterior neck? (above the hyoid) |
1. Digastric 2. Stylohyoid 3. Mylohyoid 4. Geniohyoid |
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What is the function of the digastric? |
elevates hyoid and depresses mandible (open mouth) |
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What is the function of the stylohyoid? |
elevates hyoid bone |
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What is the function of the mylohyoid? |
elevates hyoid and raises floor of mouth |
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What is the function of the geniohyoid? (genio = bend of the mandible) |
elevates hyoid bone
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What are the infrhyoid muscles of the anterior neck? |
1. Sternohyoid 2. Omohyoid 3. Sternothyroid 4. Thyrohyoid |
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What is the function of the sternohyoid? |
depresses hyoid |
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What is the function of the omohyoid? (om = shoulder) |
depresses hyoid |
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What is the function of the sternothyroid? |
depresses thyroid cartilage |
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What is the function of the thyrohyoid? |
depresses hyoid bone and raises thyroid cartilage |
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What are the deep back muscles? |
1. Quadratus Lumborum 2. Erector Spinae |
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What is the function of the quadratus lumborum? |
together: extend lumbar vertebral column unilaterally: each laterally flexes vertebral column |
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What is the function of the erector spinae? |
extend the vertebral column |
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What does the erector spinae consist of? |
1. Iliocostalis-most lateral 2. Longissimus-intermediate 3. Spinalis-most medial |
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What are the deep thorax muscles? |
1. Diaphragm 2. External Intercostals 3. Internal Intercostals 4. Scalenes |
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What is the function of the diaphragm? |
contraction pulls the central portion down, increasing vertical dimensions of thorax |
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What is the function of the external intercostals? |
elevate the ribs during inhalation (from the rib above --> the rib above) |
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What is the function of the internal intercostals? |
elevate ribs during exhalation (from the rib below --> the rib above) |
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What is the function of the scalenes? |
elevates ribs during inspiration |
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What are the abdominal muscles? |
1. External Abdominal Oblique 2. Internal Abdominal Oblique 3. Transverse Abdominis 4. Rectus Abdominis |
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What are the muscles of the pelvic floor and perineum known as? |
pelvic diaphragm or urogenital diaphragm |
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What is the function of the pelvic floor and perineum? |
1. Closes inferior opening of pelvis 2. Supports the pelvic organs |