Term
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Definition
- Origin: Superior Nuchal line, External occipital protuberance, Nuchal lig., Spinousous processes of C7-T12.
- Insertion: Lateral 1/3 of clavicle, acromion, scapular spine
- Action: elevation, depression, upward rotation, retraction of scapula
- Innervation: Spinal accessory n. Sensory: C3,4
- Blood supply: Transverse Cervical a.
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Term
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Definition
- Origin: spinous proccesses of T6-T12, Thoracolumbar fascia, bottom 3-4 ribs, iliac crest.
- Insertion: Floor of intertubercular groove of humerus.
- Action: Internal rotation of humerus, Adduction
- Innervation: Thoracodorsal n.
- Blood supply: Thoracodorsal a.
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Term
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Definition
- Origin: Posterior transverse proccesses of C2,C3, C4
- Insertion: posteromedial border of scapula superior to root of scapular spine.
- Action: Downward rotation and elevation of scapula
- Innervation: Dorsal Scapular n.
- Blood supply: Dorsal Scapular n.
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Term
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Definition
- Origin: Spinous proccesses of T2-T5
- Insertion: Medial border of scapula inferior to scapular spine
- Action: Retraction, dowward rotation of scapula
- Innervation: Dorsal scapular n.
- Blood supply: Dorsal scapular a.
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Term
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Definition
- Origin: Spinous proccesses of C7&T1, Nuchal lig.
- Insertion: medial border adjacent ot smoot triangular spact at base of scapular spine.
- Action: Retraction and downward rotation of scapula
- Innervation: Dorsal Scapular n.
- Blood supply: Dorsal Scapular a.
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Term
| Serratus Posterior Superior |
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Definition
- Origin: Nuchal lig., S.P. of C7-T3
- Insertion: superior borders of 2nd to 4th ribs
- Action: proprioception (elevation of ribs); considered accessory muscle of respiration.
- Innervation: 2nd-5th intercostal n.
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Term
| Serratus Posterior Inferior |
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Definition
- Origin: S.P. of T11-L2
- Insertion: Inferior borders of 8th-12th ribs near their angles
- Action: Proprioception (depress ribs); considered accessory muscle of respiration
- Innervation: Ventral rami to T9-T12
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