Muscles of back - text

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Author:
klingap
ID:
30853
Filename:
Muscles of back - text
Updated:
2010-08-23 00:36:21
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muscles back text
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Description:
text of the muscles of the back including arteries, nerves, and function
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  1. Trapezius
    • Superficial
    • Origin: Superior nuchal line, spines of C7-T12
    • Insertion: Acromion, spine of scapula
    • Function: Elevate, retract, depress scapula. Rotate superiorly the glenoid fossa
    • Nerve: spinal accessory n. XI (Note: NOT part of ventral rami)
    • Blood: superficial branch of transverse cervical a.
  2. Latissimus dorsi
    • Superficial
    • Origin: Spines of T7-T12, thoracolumbar fascia, iliac crest
    • Insertion: intertubercular groove of humeru
    • sFunction: extends, abducts, rotates humerus (e.g. climbing/swimming)
    • N: thoracodorsal n. (branch from brachial plexus from ventral rami)
    • Blood: thoracodorsal a.
  3. Levator scapulae
    • Superficial
    • Origin: Transverse processes C1-C4
    • Insert: superior angle and medial border of scapula
    • Funct: elevate scapula and inferior rotation of glenoid fossa
    • N: dorsal scapular n.
    • Blood: deep branch of transverse cervical a.
  4. Rhomboid minor
    • Superficial
    • Origin: nuchal lig. and spines of C7-T1
    • Ins: medial border of scapula @ root of spine of scapulaFunct: retract scapula, inferior rotation ofglenoid fossa
    • N: dorsal scapular n.
    • A: deep branch of transverse cervical a.
  5. Rhomboid Major
    • Superficial
    • Origin: Spines T2-T5
    • Insert: medial border inferior to root of spine of scapulaFunct: retract scapula and inferior rotation of glenoid fossa
    • N: dorsal scapular n.
    • Blood: deep branch of transverse cervical a.
  6. Serratus posterior superior
    • Intermediate
    • O: nuchal lig, spines C7-T3
    • I: ribs 2-4
    • Funct: elevate ribs
    • n: ventral rami of spinal nerve (intercostal n.)
  7. Serratus posterior inferior
    • Intermediate
    • O: Spines T11-L2
    • I: Ribs 8-12
    • Funct: depress ribs
    • N: ventral rami of spinal n (intercostal n.)
  8. Splenius capitus
    • Deep: Superficial - spinotransversales
    • O: nuchal lig, spines C7-T4
    • I: mastoid prs. and superior nuchal line
    • Funct: extend head, rotate head
    • n: dorsal rami of spinal nerve
  9. Splenius cervicus
    • Deep: Superficial - spinotransversales
    • O: Spines T3-T6
    • I: Transverse prs. C1-C3
    • Funct: extend neck, rotate head
    • n: dorsal rami of spinal nerve
  10. Erector spinae - iliocostalis, longissimus, spinalis
    • Intermediate group
    • O: tendon from iliac crest, sacrum and lumbar spines
    • I: ribs, tranverse prs., spinous prs., head
    • Funmct: extend spine and head
    • N: dorsal rami
  11. Transversospinalis - semispinalis, multifidus, rotatores
    • Deep: Deep
    • O: transverse prs. of vertebrae
    • I: spines of superior vertebrae (run superiorly, semi - 4-6 segments, mult 2-4 segments, rot 1-2 segments)
    • Funct: extend head and vertebral column, rotate trunk, and stabilize vertebral column
    • N - dorsal rami
  12. Interspinales
    • Deep: Deep ("between spines")
    • O: spines of vertebrae
    • I: spines of adjacent vertebrae
    • Funct: stabilize and extend vertebral column
    • N: dorsal rami
  13. Intertransversarii
    • Deep: Deep ("between transverse prs")
    • O: transverse prs.
    • I: vertically adjacent transverse prs.
    • Funct: stabilize vertically, lateral flexion
    • N: dorsal rami
  14. Levatores costarum
    • Deep: Deep ("elevate rib")
    • O: transverse prs. C7-T11
    • I: subjacent ribs
    • Funct: elevate ribs
    • N: dorsal rami
  15. Rectus capitus posterior minor
    • Deep: Suboccipital
    • O: posterior tubercle C1
    • I: medial inferior nuchal line
    • Funct: Posture
  16. Rectus capitus posterior mjaor
    • Deep: Suboccipital
    • O: Spine C2
    • I: lateral part of inferior nuchal line
    • Funct: posture
  17. Obliquus Capitus inferior
    • Deep: Suboccipital
    • O: Spine C2
    • I: Transverse prs. C1
    • Funct: posture

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