Muscles Group 1 a

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    • Frontalis
    • Origin: Epicranial aponeurosis
    • Insertion: skin of eyebrows
    • Action: elevates eyebrows
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    • Occipitalis
    • Origin: superior nuchal line of occipital bone
    • Insertion: epicranial aponeurosis
    • Action: pulls scalp posteriorly
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    • Orbicularis Oculi
    • Origin: mesial aspect of bony orbit
    • Insertion: skin around eyelids
    • Action: closes eyelid
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    • Temporalis
    • Origin: temporal bone
    • Insertion: coronoid process of mandible
    • Action: elevates mandible
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    • Masseter
    • Origin: zygomatic arch
    • Insertion: angle and ramus of the mandible
    • Action: elevates the mandible
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    • Orbicularis Oris
    • Origin: corners of mouth
    • Insertion: submucosa and dermis of the lips
    • Action: closes and purses lips
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    • Zygomaticus Major
    • Origin: zygomatic bone
    • Insertion: angle of mouth
    • Action: elevates corners of mouth
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    • Risorius
    • Origin: fascial of masseter
    • Insertion: corner of mouth
    • Action: draw corners of mouth laterally
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    • Omohyoid
    • Superior Belly:
    • Origin: clavicle
    • Insertion: hyoid bone
    • Inferior Belly:
    • Origin: superior scapula
    • Insertion: clavicle
    • Action: depresses hyoid bone
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    • Sternohyoid
    • Origin: manubrium
    • Insertion: hypoid bone
    • Action: depresses hyoid bone during swallowing
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    • Mylohyoid
    • Origin: mylohyoid line
    • Insertion: hyoid bone
    • Action: elevates hyoid bone
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    • Digastric Anterior Belly
    • Origin: inferior margin of mandible
    • Insertion: hyoid bone
    • Action: depresses mandible
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    • Digastric Posterior Belly
    • Origin: mastoid process
    • Insertion: hyoid bone
    • Action: retracts hyoid bone
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    • Sternocleidomastiod
    • Origin: manubrium and clavicle
    • Insertion: mastoid process
    • Action: flexion of the neck
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    • Trapezius
    • Origin: superior nuchal line and spinous processes of vertebrae
    • Insertion: acromion and spine of scapula
    • Action: extend neck; retracts scapula
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    • Latissimus Dorsi
    • Origin: spinous processes of vertebrae T6-T12
    • Insertion: intertubercular groove of humerus
    • Action: Adduction of the arm
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    • Levator Scapula
    • Origin: transverse processes of cervical vertebrae
    • Insertion: medial border of scapula
    • Action: elevates scapula
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    • Rhomboid Major
    • Origin: spinous processes of T1-T5
    • Insertion: Medial border of scapula
    • Action: adducts scapula
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    • Rhomboid Minor
    • Origin: spinous processes of C7-T1
    • Insertion: medial border of scapula
    • Action: adducts and fixes the scapula
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    • Serratus Anterior
    • Origin: ribs 1-8
    • Insertion: medial border of scapula
    • Action: rotates scapula
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    • Erector Spinae
    • Origin: spinous processes of lumbar vertebrae
    • Insertion: angles of ribs
    • Action: extends vertebral column
Author:
madrat
ID:
316541
Card Set:
Muscles Group 1 a
Updated:
2016-02-26 20:35:08
Tags:
muscles anatomy
Folders:
A&P
Description:
Group 1 Muscles Origins, Insertions, and Actions for BI 231 PCC
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