LFS122 Human Anatomy
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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| Sternocleidomastoid | ACTION: Flexion of neck. Lateral flexion and turning of the head. | ORIGIN: Manubrium of sternum; sternal third of clavicle. | INSERTION:
Mastoid process; lateral half of superior nuchal line.
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| Diaphragm | ACTION: | ORIGIN: | INSERTION:
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| External Intercostals | ACTION: Elevates rib cage. | ORIGIN: Inferior border of the ribs. | INSERTION:
Superior border of ribs.
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| Internal Intercostals | ACTION: Depresses rib cage. | ORIGIN: Superior border of ribs. | INSERTION:
Inferior border of ribs.
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| External Abdominal Oblique | ACTION: Flexes vertebral column. Compresses abdominal wall. | ORIGIN: Ribs 5-12 | INSERTION:
Linea alba.
Pubic crest.
Pubic tubercle.
Iliac crest.
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| Internal Abdominal Oblique | ACTION: Flexes vertebral column. Compresses abdominal wall. | ORIGIN: Lumbar fascia. Iliac crest. Inguinal ligament. | INSERTION:
Linea alba.
Pubic crest.
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| Transverse Abdominis | ACTION: Compresses abdominal contents. | ORIGIN: Inguinal ligament. Lumbar fascia. Cartilages of the last 6 ribs. Iliac crest. | INSERTION:
Linea alba.
Pubic crest.
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| Rectus Abdominis | ACTION: Flexes lumbar region of vertebral column. Rotates lumbar region of vertebral column. | ORIGIN: Pubic crest. Pubic symphysis. | INSERTION:
Xiphoid process.
Ribs 5-7.
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| Erector Spinae (Iliocostalis) | ACTION: Extend vertebral column, maintain posture. Lateral flexion when acting on one side. | ORIGIN: Iliac crests (lumborum). Inferior 6 ribs (thoracis) Ribs 3-6 (cervicis) | INSERTION:
Angle of ribs (lumborum & thoracis).
Cervical vertebrae C6-C4 (cervicis)
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| Erector Spinae (Longissimus) | ACTION: | ORIGIN: | INSERTION:
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| Erector Spinae (Spinalis) | ACTION: | ORIGIN: | INSERTION:
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| Quadratus Lumborum | ACTION: Flexes vertebral column laterally when alone. When together, extends lumbar spine and fixes 12th rib. Maintains upright posture. Assists in forced breathing. | ORIGIN: Iliac crest and lumbar fascia. | INSERTION:
Transverse process of upper lumbar vertebrae and lower margin of 12th rib.
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| Multifidus | ACTION: | ORIGIN: | INSERTION:
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| Transversus Thoracis | ACTION: | ORIGIN: | INSERTION:
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| Pectoralis Minor | ACTION: | ORIGIN: | INSERTION:
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| Pectoralis Major | ACTION: | ORIGIN: | INSERTION:
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| Serratus Anterior | ACTION: Rotates inferior angle of scapula laterally. | ORIGIN: Ribs 1-8 | INSERTION:
Vertebral border of the scapula.
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| Latissimus Dorsi | ACTION: | ORIGIN: | INSERTION:
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| Scalenes | ACTION: Elevates ribs. Flexion of the neck. | ORIGIN: Transverse processes of cervical vertebrae (C1 - C7) | INSERTION:
Ribs 1-2
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| Trapezius | ACTION: Elevates, depresses, rotates and adducts scapula. | ORIGIN: Occipital bone. Spinous processes of C7-T12. | INSERTION:
Lateral third of the clavicle.
Spine of scapula.
Acromion process of scapula.
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lhp001
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