The Muscular System Major Movers and Shakers

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The Muscular System Major Movers and Shakers

• BIOL 2400 Anatomy and Physiology 1
• Chapter 11

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Temporalis
  O Temporal fossa I Coronoid process and
ramus of the mandible A Elevation of the
mandible
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Masseter
 O Maxilla and the anterior portion of
the zygomatic arch    I Angle and the ramus of
the mandible.    A Elevation of the
mandible
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Orbicularis oculi
O Medial wall of the orbit   I Medial wall of
the orbit   A Closes the eyelid
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Orbicularis oris
 O Opening of the mouth    I The skin at the
corners of the mouth    A Closes the mouth
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Zygomaticus major
O Zygomatic bone    I The skin at the corners
of the mouth and the orbicularis oris    A
Elevates the skin at the corners of the
mouth (smiling)
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Depressor anguli oris
O Anterior 1/3 of the body of the mandible,
lateral to the mental foramen    I Angle of the
mouth    A Draws the angle of the mouth
laterally and inferiorly, as in opening
the mouth
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Supraspinatus
O The supraspinous fossa of the scapula I The
greater tubercle of the humerus A Weak
ABduction of the shoulder joint
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Infraspinatus
O The infraspinous fossa of the scapula I The
greater tubercle of the humerus   A Lateral
rotation of the humerus
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Teres minor
O Inferior lateral border of the scapula I The
greater tubercle of the humerus A Lateral
rotation of the humerus
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Pectoralis minor
O Ribs 3 through 5   I The coracoid process of
the scapula A Protraction of the scapula
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Rhomboid major
O The spinous processes of T2 through T5   I
The vertebral border of the scapula, inferior to
the spine   A Retraction of the scapula
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Rhomboid minor
O The spinous processes of C7 through T1   I
The vertebral border of the scapula, superior to
the spine   A Retraction of the scapula
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Levator scapulae
O The transverse processes of C1 through C4   I
The superior angle of the scapula   A Elevation
of the scapula