Term
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Definition
| Erector spinae (3 divisions: Spinalis, Longissimus, Ileocostalis); all act on the vertebral column, all are innervated by dorsal rami of spinal nerves (PPR) |
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Term
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Definition
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lies deep to the trapezius, fibers course obliquely across the neck; splenius capitis and splenius cervicis |
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Term
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Definition
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Action: Extends head and neck
O: NL, C7-T4; I: MP, SNL
Nerve: PPR C3, C4 |
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Term
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Definition
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O: spinous processes of T3-T4; A: transverse processes C1-C3
Action: extends head and neck; laternal rotation, flexion
Nerve: PPR C5-C6 |
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Term
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Definition
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lies deep to the serratus posterior/splenius muscles, contains three columns (spinalis, longissimus, ileocostalis), fused inferiorly where they attach to the sacrum and ileum; all act on spinal column |
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Term
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Definition
| medial column, both superior and inferior attachments are on spinious processes, has lumbar, thoracic, and cervical vertebral levels |
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Term
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Definition
| central column, superior attachments are the transverse processes of thoracic and cervical vertebrae, most superior portion attaches to the mastoid process “longissimus capitis” |
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Term
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Definition
| superior attachments are on ribs |
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Term
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Definition
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deep investing membrane which covers the deep muscles of the back of the trunk; contains the erector spinae; continuous with the nuchal fascia |
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Term
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Definition
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partially deep to trapezius
O: spinous processes of T7-12, thoracolumbar fascia, iliac crest, inf. 3-4 ribs; I: bicipital groove of humerus
Action: adducts, extends, rotates arm
Nerve: TD C6-8
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Term
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Definition
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large, superificial muscle
O: SNL, EOP, spinous processes of C7-T12, NL; I: spine of scapula, acromion, post. lat. 1/3 of clavicle
Action: adduction, retraction, depression, medial rotation, elevation of scapula; abducts arm
Nerve: APR C3-4 (sensory), SAN (motor) NOT dorsal rami (PPR) |
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Term
| serratus posterior inferior |
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Definition
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very thin muscle, deep to latissimus dorsi, superficial to erector spinae
O: spinous processes of T11 to L2; A: inferior borders of ribs 9-12, lateral to their angels
Action: Depresses lower ribs, aiding in exhalation
Nerve: Intercostal nerves T9-12
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Term
| serratus posterior superior |
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Definition
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deep to rhomboid muscles, superficial to splenius, erector spinae
O: NL, SSL, spinous processes C7-T3; I: ribs 2-5
Action: elevates ribs, aiding in inhalation
Nerve: intercostal T1-4
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Term
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Definition
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deep to trapezius
O: spinous processes T2-T5, SSL; I: medial border of scapula
Action: adducts, rotates, fixes scapula; depresses glenoid cavity
Nerve: dorsal scapular nerve |
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Term
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Definition
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deep to trapezius
O: NL, spinous processes of C7-T1 ;I: root of scapular spine
Action: adducts, rotates, fixes scapula
Nerve: dorsal scapular nerve |
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Term
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Definition
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O: transverse processes C1-C4; I: sup. med. border of scapula
Action: elevates scapula, rotates glenoid cavity
Nerve: DS nerve (motor); C3-4 APR (sensory) |
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Term
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Definition
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deep to the splenius, medial to longissimus capitis
O: transverse processes of C7-T7; I: between SNL, INL
Action: extends head and neck
Nerve: PPR C1-8 |
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Term
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Definition
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lateral to semispinalis capitis
O: transverse processes of C, T1-T5 I: mastoid process
Action: extends/laterally bends spine, head, neck
Nerve: dorsal rami |
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Term
| rectus capitis posterior minor |
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Definition
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peripheral to suboccipital triangle
O: posterior tubercle of C1; I: INL (medial)
Action: extends head and neck
Nerve: suboccipital (PPR C1)
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Term
| rectus capitis posterior major |
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Definition
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suboccipitial triangle
O: spinous process of C2; I: INL
Action: extends, rotates atlantooccipital joint
Nerve: Suboccipital (PPR C1) |
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Term
| obliquus capitis superior |
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Definition
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suboccipital triangle
O: transverse process of C1, I: between SNL,INL Action: Extends atlantoaxial joint, head rotation Nerve: Suboccipital nerve (PPR C1) |
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Term
| obliquus capitis inferior |
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Definition
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suboccipital traingle
larger of the two oblique muscles of the neck
O: spinous process of C2, I: transverse process of C1 Action: Rotation of the atlantoaxial joint
Nerve: Suboccipital nerve (PPR C1) |
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Term
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Definition
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arises from brachial plexus; innervates the rhomboids and levator scapulae |
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Term
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Definition
| arises from brachial plexus; supplies latissimus dorsi |
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Term
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Definition
| supplies latissimus dorsi, not the same as dorsal scapular artery |
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Term
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Definition
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supplies levator scapulae, rhomboids, and trapezius |
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Term
| transverse cervical artery vs. transverse cervial nerve |
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Definition
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