Term
Trapezius
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Definition
Trapezius
O: Nuchal ligament, Occipital protuberance, spinous processes of C7-T12
I: Clavicle, scapular spine
Action: Ascending trapezius - elevates scapula
Middle trapezius - retracts scapula
Descending trapezius - depresses scapula
Nerve: CN XI (accessory), C3-C4 |
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Term
Latissimus Dorsi
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Definition
Latissimus Dorsi
O: SP T7-T12, Iliac crest, Thoracolumbar fascia
I: Intertubercular groove of humerus
Action: EXT, ADD, and medially rotates humerus
Nerve: Thoracodorsal n. |
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Term
Rhomboideus Major
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Definition
Rhomboideus Major
O: SP T2-T5
I: Medial border of scapula
Action: Elevates and ADD scapula, rotate glenoid cavity inferiorly, and fixes scapula to thoracic wall
Nerve: Dorsal scapular n. |
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Term
Rhomboideus Minor
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Definition
Rhomboideus Minor
O: Nuchal ligament, SP C7-T1
I: Medial border of scapula
Action: Elevate and ADD scapula, rotate glenoid cavity inferiorly, and fixes scapula to thoracic wall
Nerve: Dorsal scapular n. |
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Term
Levator Scapulae
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Action:
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Definition
Levator Scapulae
O: TP C1-C4
I: Superior angle of scapula
Action: Elevates and ADD scapula, also rotates glenoid cavity inferiorly
Nerve: Dorsal scapular n. |
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Term
Splenius Capitis
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Definition
Splenius Capitis
O: Nuchal ligament, SP of C7-T6
I: Mastoid process
Action: (bilateral) extends head and neck; (unilateral) ipsilateral rotation
Nerve: Dorsal rami |
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Term
Splenius Cervicis
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Action:
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Definition
Splenius Cervicis
O: Nuchal ligament, SP of C7-T6
I: TP of C1-C3
Action: (bilateral) extends head and neck; (unilateral) ipsilateral rotation
Nerve: Dorsal rami |
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Term
Iliocostales
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I:
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Definition
Iliocostales
O: Posterior iliac crest, posterior sacrum, SPs of lumbar/sacral vertebrae
I: Ribs and TP of cervical vertebrae
Action: (bilateral) Extends vertebral column and head; (unilateral) ipsilateral rotation
Nerve: Dorsal rami |
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Term
Longissimus
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Action:
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Definition
Longissimus
O: Posterior iliac crest, posterior sacrum, SPs of lumbar/sacral vertebrae
I: Ribs and TP of cervical/thoracic vertebrae, mastoid process
Action: (bilateral) Extends vertebral column and head; (unilateral) ipsilateral rotation
Nerve: Dorsal rami |
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Term
Spinales
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I:
Action:
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Definition
Spinales
O: Posterior iliac crest, posterior sacrum, SPs of lumbar/sacral vertebrae
I: SP of cervical/thoracic vertebrae
Action: (bilateral) Extends vertebral column and head; (unilateral) ipsilateral rotation
Nerve: Dorsal rami |
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Term
Semispinalis
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Action:
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Definition
Semispinalis
O: Transverse processes
I: Spinous process of more superior vertebra
Action: EXT vertebral column
Nerve: Dorsal rami |
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Term
Multifidus
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Definition
Multifidus
O: Transverse processes
I: Spinous process of more superior vertebra
Action: Rotate vertebral column
Nerve: Dorsal rami |
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Term
Rotatores
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Definition
Rotatores
O: Transverse processes
I: Spinous process of more superior vertebra
Action: Rotate vertebral column
Nerve: Dorsal rami |
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Term
Interspinalis
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Action:
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Definition
Interspinalis
O and I: Unite spinous process of consecutive vertebrae
Action: EXT vertebral column
Nerve: Drosal rami |
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Term
Intertransversarii
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O and I:
Action:
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Definition
Intertransversarii
O and I: Unite transverse processes of consecutive vertebrae
Action: (bilateral) EXT vertebral column, (unilateral) ipsilateral rotation
Nerve: Ventral rami |
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Term
Rectus Capitis Posterior Major
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Definition
Rectus Capitis Posterior Major
O: SP C2
I: Inferior nuchal line
Action: (bilateral) EXT head; (unilateral) ipsilateral rotation (at the atlantooccipital joint)
Nerve: Suboccipital n. (via dorsal ramus C1) |
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Term
Rectus Capitis Posterior Minor
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Action:
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Definition
Rectus Capitis Posterior Minor
O: Posterior arch of C1
I: Inferior nuchal line
Action: (bilateral) EXT head; (unilateral) ipsilateral rotation (at the atlantooccipital joint)
Nerve: Suboccipital n. (via dorsal ramus C1) |
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Term
Obliquus Capitis Superior
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Definition
Obliquus Capitis Superior
O: TP of C1
I: Occipital bone
Action: EXT of head
Nerve: Suboccipital n. (via dorsal ramus C1) |
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Term
Obliquus Capitis Inferior
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Definition
Obliquus Capitis Inferior
O: SP of C2
I: TP of C1 (remember, does not attach to head even though capitis)
Action: Ipsilateral rotation
Nerve: Suboccipital n. (via dorsal ramus C1) |
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