Muscle Actions and Attachments
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Rectus Capitis Lateralis - Actions | Atlanto-occipital: Lateral Flexion
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| Rectus Capitis Lateralis - Attachments | O: Transverse process of C1 (atlas)
I: Occipital Bone (jugular process)
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| Rectus Capitis Posterior Minor - Actions | Atlanto-occipital: Extension
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| Rectus Capitis Posterior Minor - Attachments | O: Tubercle of posterior arch of (C1) atlas
I: Most medial fossa below inferior nuchal line (next to foramen magnum)
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| Rectus Capitis Posterior Major - Actions | Atlanto-occipital: Extension
Atlanto-occipital: Same Side Rotation
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| Rectus Capitis Posterior Major - Attachments | O: Spinous Process of C2 (axis)
I: Middle fossa below lateral inferior nuchal line (lateral to Rectus Capitus Posterior Minor.
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| Obliquus Capitis Inferior - Actions | Atlanto-axial: Same Side Rotation
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| Obliquus Capitis Inferior - Attachments | O: Spine & Lamina of C2 (axis)
I: Transverse Process of C1 (atlas)
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| Obliquus Capitis Superior - Actions | Atlanto-occipital: Extension, lateral flexion, (opposite side rotation?)
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| Obliquus Capitis Superior - Attachments | O: Transverse process of C1 (atlas)
I: Most lateral fossa, extending between superior and inferior nuchal lines and overlapping insertion of Rectus Capitis Posterior Major
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| Rectus Capitis Anterior - Actions | Atlanto-occipital: Flexion
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| Rectus Capitis Anterior - Attachments | O: Anterior Surface of the lateral mass of C1 (atalas)
I: Basal part of the occipital bone
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| Anterior Scalene - Actions | Cervical vertebrae: Flexion, lateral flexion
Costovertebral: Elevation of rib #1 (inspiration)
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| Anterior Scalene - Attachments | O: Anterior tubercles on transverse process of C3-C6
I: Rib #1
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| Middle Scalene - Actions | Cervical Vertebrae: Lateral Flexion
Costovertebral: Elevation of rib #1 (inspiration)
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| Middle Scalene - Attachments | O: Posterior tubercles on transverse process of C2-C7
I: Rib #1
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| Posterior Scalene - Actions | Cervical Vertebrae: Lateral flexion
Costovertebral: Elevation of rib #2 (inspiration)
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| Posterior Scalene - Attachments | O: Posterior tubercles on transverse process of C4-C6
I: Rib #2
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| Sternocleidomastoid - Actions | Head and Cervical vertebrae: Flexion, Lateral Flexion, Opposite Side Rotation
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| Sternocleidomastoid - Attachments | O: Manubrium of sternum next to the sternal notch, medial 1/3 of clavicle
I: Mastoid process and lateral part of superior nuchal line.
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| Quadratus Lumborum - Actions | 12th rib: Stabilization
Lumbar spine: Lateral flexion, extension
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| Quadratus Lumborum - Attachments | O (caudal): Iliolumbar ligament & adjacent iliac crest
I (cranial): 12th ribs, tip of transverse process of L1-L4.
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| Iliacus - Actions | Hip: Flexion and lateral rotation
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| Iliacus - Attachments | O: Iliac fossa
I: Lesser trochanter (common tendon with psoas major)
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| Psoas major - Actions | Hip: Flexion, Lateral Rotation
Lumbar Spine: Extension, lateral flexion, stabilization
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| Psoas Major - Attachments | O: Lateral part of bodies and discs, anterior transverse processes from T12-L5: Lesser trochanter or femur (common tendon with iliacus)
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| Rectus Abdominis - Actions | Lumbar Spine: Flexion
Ribs: Depression
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| Rectus Abdominis - Attachments | O: Costal Cartilage 5, 6, 7, xiphoid process
I: Pubic crest and tubercles
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| External Oblique - Actions | Vertebral Column: Flexion, lateral flexion, opposite side rotation.
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| External Oblique - Attachments | O: Lower margin of ribs 5-12
I: Anterior part of the iliac crest, inguinal ligament, rectus sheath and linea alba
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| Multifidus - Actions | Vertebrae: Extension, Lateral Flexion, Opposite Side Rotation
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| Multifidus - Attachments | O: (caudal) All transverse processes from sacrum to C4 (articular process in the lumber region)
I: (cranial) Spinous process of two to five vertebrae above
Hint: 4 strands from each transverse process fan out to spinous process 2 to 5 vertebrae above.
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Created by:
chuddles33
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