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wright's anatomy
gross anatomy
| Question | Answer |
|---|---|
| proximal attachment of upper trapezius | external occipital protuberance, superior nuchal line, ligamentum nuchae |
| distal attachment of upper tapezius | upper lip of lateral third of clavicle |
| action of upper trapezius | elevates shoulder; rotates scapula upward |
| innervation of upper trapezius | spinal accessory n (cranial n XI) |
| proximal attach. middle trapezius | spinous processes of C7 to T3-4 |
| distal attach. middle trapezius | medial margin of the acromion, and into the superior lip of the posterior border of the spine of the scapula |
| action of middle trapezius | retracts scapula, contributes to upward rotation |
| innervation of middle trapezius | spinal accessory n (cranial n XI) |
| proximal attach. lower trap | spinous processes of T3-T12 |
| distal attach. lower trap | triangular area at the medial end of the scapular spine |
| action of lower trap | depresses scapula, upwardly rotates scapula |
| innervation of lower trap | spinal accessory n: caranial nerve XI |
| proximal attach rhomboids | spinous processes of C7-T1 (minor), T2-5, major |
| distal attach rhomboids | medial border of scapula: minor, above the spine, major below it |
| action of rhomboids | retracts scapula, elevates scapula and downwardly rotates scapula |
| innervation of rhomboids | dorsal scapular |
| prox. attach. levator scapulae | transverse processes of the atlas and axis and from the posterior tubercles of the transverse processes of the third and fourth cervical vertebrae |
| distal attach. levator scapulae | medial border of the scapula between the superior angle and root of the spine |
| action of levator scapulae | elevates scapula, downwardly rotates scapula |
| innervation of levator scapula | dorsal scapular |
| prox. attach. serratus anterior | anterior surfaces of upper 8 ribs |
| distal attach. serratus anterior | medial border of the anterior surface of the subscapular fossa of the scapula |
| action of serratus anterior | protracts and rotates scapula upward |
| innervation of serratus anterior | long thoracic |
| proximal attach. lat | thoracodorsal fascia, sacrum, iliac crest, spinous processes of lumbar vertebrae |
| distal attach. lat | floor of bicipital groove of humerus; spirals anterior to teres major tendon |
| action of lat | depresses & downwardly rotates scapula at the SC and AC joints; elevates trunk against fixed scapula; internal rotation;extends arm; adducts arm |
| innervation of lat | thoracodorsal n |
| prox. attach. ant. delt | lateral third of clavicle |
| distal attach. ant. delt | deltoid tuberosity |
| action of ant. delt | gh addtuction, flexion, internal rotation |
| innervation of ant. delt | axillary |
| prox. attach. mid. delt | acromion of scapula |
| dist attach mid delt | deltoid tuberosity |
| action of mid delt | gh abduction |
| innervation of mid delt | axillary |
| prox attach post delt | ower lip of the posterior border of the spine of the scapula, |
| dist attach post delt | deltoid tuberosity |
| action of post delt | gh adduction, extension, external rotation |
| innervation of post delt | axillary nerve |
| prox attach supraspinatous | supraspinus fossa of scapula |
| dist attach supraspinatous | greater tubercle superior facet of humerus |
| action of supraspinatous | gh abduction |
| innervation of supraspinatous | suprascapular nerve which runs through the suprascapular notch |
| prox attach of infraspinatous | infraspinous fossa of scapula |
| dist attach of infraspinatous | greater tubercle, middle facet of humerus |
| action of infraspinatous | gh external rotation: the infraspinatous likely assists in adduction and extension as well pg 161 Neumann |
| innervation of the infraspinatous | suprascapular n |
| prox attach teres minor | lateral border of scapula superior to teres major |
| dist attach teres minor | greater tubercle, inferior facet of humerus |
| action of teres minor | gh external rotation: the teres minor likely assists in adduction and extension as well pg 161 Neumann |
| innervation of teres minor | axillary n |
| prox attach subscap | anterior surface of subscapular fossa of scapula |
| distal attach subscap | lesser tubercle of humerus |
| innervation of subscap | upper and lower subscapular nerves |
| action of subscap | gh internal rotation, adduction, extension |
| prox attach teres major | lower third of lateral side, posterior aspect of inferior angle of scapula below teres minor |
| dist attach teres major | medial lip of bicipital groove (anterior to latissimus dorsi) |
| action of teres major | gh internal rotation, extension, adduction |
| innveration of teres major | lower subscapular nerve |
| prox attach pec major clavicular head | anterior surface of the medial third of clavicle, lower lip |
| dist attach pec major clavicular head | lateral lip of bicipital groove |
| action pec major clavicular head | gh horizontal abduction, flexion, adduction below 90*; abduction above 90¡ |
| innervation of pec maj clavicular head | medial and lateral pectoral nerves (named for the cord of the brachial plexus) |
| prox attach pec maj sternal head | anterior surface of sternum and costal cartilages |
| dist attach pec maj sternal head | lateral lip of bicipital groove |
| action pec maj sternal head | gh adduction, horizontal abduction |
| innervation of pec maj sternal head | medial and lateral pectoral nerves |
Created by:
jbond9
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