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19 Cards in this Set
- Front
- Back
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Superficial muscles of the back
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Control upper limb movement
Trapezius Latissimus Dorsi Rhomboids Levator Scapulae |
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Latissimus Dorsi
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extends, adducts, medially rotates humerus
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Latissimus Dorsi origin
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Spinous processes of T7 - T12
Iliac crest thoracolumbar fascia |
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Latissimus Dorsi insertion
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bicipital groove of humerus
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Latissimus Dorsi innervation
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thoracodorsal nerve
ventral rami of C6, 7, 8 |
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Trapezius
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shrugs shoulders
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Trapezius origin
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external occipital protuberance
spinous processes of C7- T12 nuchal ligament |
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Trapezius insertion
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acromion
scapula spine clavicle |
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Trapezius innervation
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Spinal Accessory Nerve (Cranial Nerve 11) for motor
C3&4 for sensory |
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Thoracolumbar Fascia
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attaches to spinous/transverse processes and is site of attachment for many back muscles
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Intermediate Muscles of Back
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function in respiration
Serratus posterior superior and inferior |
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Serratus posterior superior
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deep to rhomboids
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Serratus posterior inferior
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deep to Lat
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Deep Back Muscles
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Act on vertebral column; innervated by dorsal rami
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Superficial Deep Back muscles
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Splenius Capitis and Splenius Cervicis; contract both to extend neck; one for ipsilateral motion
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Intermediate Deep Back muscles
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Erector Spinae Complex
iliocostalis longissimus spinalis |
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Erector Spinae Complex action
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Work together to extend spine; lateral flexion when used unilaterally
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Deep Deep Back Muscles
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Transversospinalis Group; important postural, rotational, prociceptive muscles. Course from transverse process of vert to spinal process of vertebrae above.
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Transversospinalis Group
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Semispinalis - superficial, spans 4-6 segments
Multifidus - intermediate, 2-4 Rotatores - deepest, 1-2 |
