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Stack #163431
Shoulder Girdle
| Question | Answer |
|---|---|
| Upper Trapezius Medial Attachment | External occipital protuberance (EOP) Ligamentum nuchae |
| Upper Trapezius Lateral Attachment | poster, lateral 1/3 of clavicle |
| Middle Trapezius Medial Attachment | SP C7 & T1-T3 (aka SP C7-T3) |
| Middle Trapezius Lateral Attachment | medial margin of acromion superior lip (upper border) of scapular spine |
| Lower Trapezius Medial Attachment | SP T4-T12 |
| Lower Trapezius Lateral Attachment | base of scapular spine |
| Trapezius Action(s) with the medial attachment (or trunk) fixed | middle fibers: adduction of scapula upper fibers: stabilization, upward rotation, elevation lower fibers: stabilization, upward rotation, depression |
| Trapezius Action(s) with the lateral attachment (or scapula) fixed | unilaterally --> upper fibers: - extension of the neck - lateral flexion - opposite side rotation bilaterally --> upper fibers: - extension of the neck |
| Trapezius Nervous Innervation | cranial nerve XI (spinal accessory) |
| Rhomboid Minor Medial Attachment | SP C7 & T1 |
| Rhomboid Minor Lateral Attachment | medial border at base of spine of scapula |
| Rhomboid Minor Action(s) | adduction elevation downward rotation |
| Rhomboid Minor Nervous Innervation | dorsal scapular (C5) |
| Rhomboid Major Medial Attachment | SP T2 - T5 |
| Rhomboid Major Lateral Attachment | medial border of scapula between the spine and inferior angle |
| Rhomboid Major Action(s) | adduction elevation downward rotation |
| Rhomboid Major Nervous Innervation | dorsal scapular (C5) |
| Levator Scapulae Medial Attachment | TP C1 - C4 |
| Levator Scapulae Lateral Attachment | medial border of scapula between superior angle and root of spine |
| Levator Scapulae Action(s) with the medial attachment (or trunk) fixed | elevation of the scapula |
| Levator Scapulae Action(s) with the lateral attachment fixed | unilaterally: - lateral flexion - same side rotation bilaterally: - extension of cervical spine - |
| Serratus Anterior Medial Attachment | costal (anterior) surface of medial border of scapula |
| Serratus Anterior Action(s) | abduction upward rotation |
| Serratus Anterior Innervation | long thoracic |
| Pectoralis Minor Inferior Attachment | anterior surface ribs 3-5 |
| Pectoralis Minor Superior Attachment | medial surface of coracoid process |
| Pectoralis Minor Action(s) | anterior tilt forced inspiration assistance |
| Pectoralis Minor Innervation | pectoral (C8-T1) |
| Trapezius Action(s) (Upper Muscle Fibers) | with the medial attachment (or trunk) fixed: - upward rotation - elevation - stabilization with the lateral attachment or scapula fixed: - unilaterally: extension, lateral flexion, & opposite side rotation -bilaterally: extension of the neck |
| Trapezius Action(s) (Middle Muscle Fibers) | abduction of the scapula |
| Trapezius Action(s) (Lower Muscle Fibers) | with the medial attachment (or trunk) fixed: - upward rotation - depression - stabilization with the lateral attachment or scapula fixed: - none |
| Muscles that perform elevation | rhomboids trapezius levator scapulae |
| Muscles that perform depression | trapezius pectoralis minor |
| Muscles that perform adduction | rhomboids trapezius levator scapulae |
| Muscles that perform abduction | serratus anterior pectoralis minor |
| Muscles that perform upward rotation | trapezius serratus anterior |
| Muscles that perform downward rotation | rhomboids (major & minor) pectoralis minor levator scapulae |
Created by:
rmo217
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