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The flashcards below were created by user
ebcross88
on FreezingBlue Flashcards.
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Trapezius M. function
- Elevation, retraction, and rotation of scapula.
- Helps in adduction and slight elevation of arm.
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Trapezius M. innervation
Accessory N. (CNXI) and C3-C4 (propioception and pain)
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Rhomboid Minor/Major M. function
- Press the scapula to the thoracic wall.
- Retraction of scapula medially.
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Rhomboid Minor/Major M. innervation
Dorsal scapular N. (C4-C5)
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Leavtor Scapulae M. function
Elevates the scapula.
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Levator Scapulae M. innervation
Dorsal scapular N. (C4-C5)
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Latissimus dorsi M. function
- Adduction and lowering the arm.
- Medial rotation and extension of the arm.
- Raises the body toward the arm when climbing.
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Latissimus dorsi M. innervation
Thoracodorsal (C6, C7, C8)
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Serratus posterior inferior/superior M. function
- Rib elevation
- *May function as accessory muscles of respiration (in COPD).
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Serratus posterior inferior/superior M. innervation
Intercoastal N. (T9-T12)
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Erector Spinae lateral M. function
- Erect posture of the body.
- Splenii rotate the head.
- Extensors when both sides contract.
- Flexion when one side contracts.
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Erector Spinae lateral M. innervation
Primary spinal dorsal rami.
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Erector Spinae medial M. function
- Extensors when both sides contract.
- Flexors when one side contracts.
- Some stabilize and some rotate the vertebral column.
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Erector Spinae medial M. innervation
Primary dorsal rami.
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Suboccipital triangle function
Turning the head backward or laterally.
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Suboccipital triangle innervation
- Sensory: Greater occipital N (C2)
- Suboccipital N (C1) innervates all 3 muscles
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Suboccipital triangle contents
- Third part of vertebral artery.
- Suboccipital N (C1) innervating all 3 muscles.
- Suboccipital plexus of veins.
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