Lab Axial Muscles

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20 Terms

1
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Orbicularis Oculi

  • Muscle of facial

  • Muscle closes the eye

<ul><li><p>Muscle of facial </p></li><li><p>Muscle closes the eye</p></li></ul><p></p>
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Orbicularis Oris

  • Muscle of facial

  • Muscle closes the mouth and protrudes the lips

<ul><li><p>Muscle of facial </p></li><li><p>Muscle closes the mouth and protrudes the lips</p></li></ul><p></p>
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Buccinator

  • Muscle of facial

  • Muscle pulls in the cheeks against the teeth

<ul><li><p>Muscle of facial </p></li><li><p>Muscle pulls in the cheeks against the teeth</p></li></ul><p></p>
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Platysma

  • Muscle of facial

  • Muscle pulls the corner of mouth down and tenses the skin of the neck

<ul><li><p>Muscle of facial </p></li><li><p>Muscle pulls the corner of mouth down and tenses the skin of the neck</p></li></ul><p></p>
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Temporalis

  • Muscle of mastication

<ul><li><p>Muscle of mastication</p></li></ul><p></p>
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Masseter (Origin, Insertion, Action)

  • Muscle of Mastication

  • Origin: zygomatic bone

  • Insertion: mandible

  • Action: elevates mandible

<ul><li><p>Muscle of Mastication</p></li><li><p><span style="color: red;"><span>Origin: zygomatic bone</span></span></p></li><li><p><span>Insertion: mandible</span></p></li><li><p><span>Action: elevates mandible</span></p></li></ul><p></p>
7
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Sternocleidomastoid (Origin, Insertion, Action)

  • Located on lateral & anterior portion of the neck

  • Origin: sternum, clavicle

  • Insertion: mastoid process of temporal bone

  • Action:

    • Bilateral contraction: cervical flexion

    • Unilateral contraction: lateral flexion to its own side and rotation of head & neck to opposite side

<ul><li><p>Located on lateral &amp; anterior portion of the neck</p></li><li><p><span style="color: red;"><span>Origin: sternum, clavicle</span></span></p></li><li><p><span style="color: yellow;"><span>Insertion: mastoid process of temporal bone</span></span></p></li><li><p><span style="color: rgb(127, 255, 212);"><span>Action:</span></span></p><ul><li><p><span style="color: rgb(127, 255, 212);"><span>Bilateral contraction: cervical flexion</span></span></p></li><li><p><span style="color: rgb(127, 255, 212);"><span>Unilateral contraction: lateral flexion to its own side and rotation of head &amp; neck to opposite side</span></span></p></li></ul></li></ul><p></p>
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Scalene

Group of three muscles

  • Anterior scalene

  • Middle scalene

  • Posterior scalene

  • Located between sternocleidomastoid muscle & anterior portion of trapezius

<p>Group of three muscles</p><ul><li><p>Anterior scalene</p></li><li><p>Middle scalene</p></li><li><p>Posterior scalene</p></li><li><p>Located between sternocleidomastoid muscle &amp; anterior portion of trapezius</p></li></ul><p></p>
9
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Iliocostalis

Muscle of vertebral column

<p>Muscle of vertebral column</p>
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Longissimus

Muscle of vertebral column

<p>Muscle of vertebral column</p>
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Spinalis

Muscle of vertebral column

<p>Muscle of vertebral column</p>
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Diaphragm (Origin, Insertion, Action)

  • Muscle of respiration

  • Origin: sternum

  • Insertion: central tendon

  • Action: contract when inhale (increases thoracic volume, decreases pressure)

<ul><li><p>Muscle of respiration</p></li><li><p><span>Origin: sternum</span></p></li><li><p><span>Insertion: central tendon</span></p></li><li><p><span style="color: rgb(231, 142, 142);"><span>Action: contract when inhale (increases thoracic volume, decreases pressure)</span></span></p></li></ul><p></p>
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Internal Intercostal

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External Intercostal

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Rectus Abdominis (Origin, Insertion, Action)

Origin: Pelvic bone

Insertion: sternum (xiphoid process)

Action: trunk flexion, compression of abdomen

<p><span style="color: red;"><span>Origin: Pelvic bone </span></span></p><p><span style="color: yellow;"><span>Insertion: sternum (xiphoid process)</span></span></p><p><span style="color: rgb(127, 255, 212);"><span>Action: trunk flexion, compression of abdomen</span></span></p>
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External Oblique (Origin, Insertion, Action)

Origin: ribs

Insertion: pelvic bone

Action: bilateral trunk flexion

<p><span>Origin: ribs</span></p><p><span>Insertion: pelvic bone</span></p><p><span>Action: bilateral trunk flexion</span></p>
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Internal Oblique (Origin, Insertion, Action)

Origin: pelvic bone

Insertion: linea alba, pubic crest,

Action: bilaterally trunk flexion

<p><span>Origin: pelvic bone</span></p><p><span>Insertion: linea alba, pubic crest,</span></p><p><span style="color: rgb(205, 135, 135);"><span>Action: bilaterally trunk flexion</span></span></p>
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Transversus Abdominis

  • Deeper than Internal Oblique

Action: Compression of abdomen

<ul><li><p><span style="color: yellow;">Deeper than Internal Oblique</span></p></li></ul><p><span><span>Action: Compression of abdomen</span></span></p>
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Linea Alba

Connective tissue (white line) on the anterior wall that divides the rectus abdominis muscle

<p>Connective tissue (white line) on the anterior wall that divides the rectus abdominis muscle</p>
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<p>Abdominals Group</p>

Abdominals Group

REIT

  1. Rectus abdominus

  2. External oblique

  3. Internal oblique

  4. Transverse abdominus