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MAK 121 - Muscle Group 2 - Origins, Insertions & Actions
Flashcards & Quiz for MAK 121 Group 2 Muscles, Origins Insertions & Actions
39
Anatomy
Undergraduate 1
01/18/2011

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Term
Diaphragm (Origin)
Definition
Costal: inner surface of lower 6 ribs; Lumbar: body of upper 2-3 lumbar vertebrae; Sternal: back of the xiphoid process
Term
Diaphragm .(Insertion)
Definition
Central tendon, attached to lungs
Term
Diaphragm _(Action)
Definition
Draws down central tendon and increases the volume of the thoracic cavity during inhalation
Term
Iliocostalis (Origin)
Definition
Common tendon.
Term
Iliocostalis .(Insertion)
Definition
Ribs.
Term
Iliocostalis _(Action)
Definition
Extend vertebral column (bilateral); lateral flexion to same side (unilateral)
Term
Longissimus (Origin)
Definition
Common Tendon
Term
Longissimus .(Insertion)
Definition
Mastoid process and superior nuchal line
Term
Longissimus _(Action)
Definition
Extend vertebral column (bilateral); laterally flex to the same side (unilateral)
Term
Multifidi (Origin)
Definition
Transverse process of vertebrae (below)
Term
Multifidi .(Insertion)
Definition
SP of 2 vertebrae, up 2 & 4 from origin (above)
Term
Multifidi _(Action)
Definition
Extend vertebral column (bilateral); rotate to opposite side (unilateral)
Term
Quadratus Lumborum (Origin)
Definition
Posterior Iliac Crest
Term
Quadratus Lumborum .(Insertion)
Definition
Last rib, and TP of L1 – L4
Term
Quadratus Lumborum _(Action)
Definition
Tilt pelvis (unilateral); lateral flexion to the same side (unilateral); assists in extension of vertebral column (bilateral)
Term
Rotatores (Origin)
Definition
TP of vertebrae (below)
Term
Rotatores .(Insertion)
Definition
SP of 2 vertebrae, up 1 & 2 from origin (above)
Term
Rotatores _(Action)
Definition
Extend vertebral column (bilateral); rotate to opposite side (unilateral)
Term
Scalenes (Origin)
Definition
Anterior: TP of C3-C6; Middle: TP of C2-C7; Posterior: TP of C5-C6
Term
Scalenes .(Insertion)
Definition
Anterior & Middle: 1st Rib; Posterior: 2nd Rib
Term
Scalenes _(Action)
Definition
With ribs fixed, laterally flexes head & neck to same side (unilateral); rotates head & neck to opposide side (unilateral); flex head & neck (bilateral); elevates ribs during inhalation (bilateral).
Term
Semispinalis Capitis (Origin)
Definition
TP of vertebrae (below)
Term
Semispinalis Capitis .(Insertion)
Definition
SP of vertebrae, up 4 from origin (above)
Term
Semispinalis Capitis _(Action)
Definition
Extends vertebral column and head
Term
Spinalis (Cervical) (Origin)
Definition
Ligamentum nuchae and SP of C7
Term
Spinalis (Cervical) .(Insertion)
Definition
–SP of upper cervicals, except C1
Term
Spinalis (Cervical) _(Action)
Definition
Extension of the head/neck
Term
Spinalis (Thoracic) (Origin)
Definition
Upper lumbar and lower thoracic SP
Term
Spinalis (Thoracic) .(Insertion)
Definition
–Upper thoracic SP.
Term
Spinalis (Thoracic) _(Action)
Definition
Extension of the vertebral column (bilateral); flexion to the same side (unilateral)
Term
Splenius Capitis (Origin)
Definition
Ligamentum nuchae, SP of C7 to T3
Term
Splenius Capitis .(Insertion)
Definition
Mastoid process & lateral superior nuchal line
Term
Splenius Capitis _(Action)
Definition
Rotate head & neck to same side (unilateral); laterally flex neck to same side (unilateral); extend head & neck (bilateral)
Term
Splenius Cervicis (Origin)
Definition
SP of T3 to T6
Term
Splenius Cervicis .(Insertion)
Definition
TP of the upper cervical vertebrae
Term
Splenius Cervicis _(Action)
Definition
Rotate head & neck to same side (unilateral); laterally flex neck to same side (unilateral); extend head & neck (bilateral)
Term
Suboccipitals (Origin)
Definition
Occiput
Term
Suboccipitals .(Insertion)
Definition
Spinous & transverse processes of C1 & C2
Term
Suboccipitals _(Action)
Definition
Tilts the head into extension, & rotates the head to the same side
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