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Stack #163431

Shoulder Girdle

QuestionAnswer
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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