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gross anatomy
upper extremity
| Question | Answer |
|---|---|
| ORIGIN OF SERRATUS POSTERIOR SUPERIOR | CAUDAL LIGAMENTUM NUCHAE, SPINOUS PROCESSES OF C7-T2 |
| INSERTION OF SERRATUS POSTERIOR SUPERIOR | SUPERIOR BORDERS OF 2,3,4,5, RIBS |
| ACTION OF SERRATUS POSTERIOR SUPERIOR | RAISES RIBS TO INCREASE THORACIC CAVITY DURING INSPIRATION |
| INNERVATION OF SERRATUS POSTERIOR SUPERIOR | INTERCOSTAL NERVES T1-4 |
| ORIGIN OF SERRATUS POSTERIOR INFERIOR | SPINOUS PROCESS OF T11,12,AND L1-3 |
| INSERTION OF SERRATUS POSTERIOR INFERIOR | INFERIOR BORDERS OF LAST 4 RIBS |
| ACTION OF SERRATUS POSTERIOR INFERIOR | DRAWS RIBS OUTWARD AND DOWNWARD CONTERACTING THE INWARD PULL OF THE DIAPHRAGM DURING EXPIRATION |
| INNERVATION OF SERRATUS POSTERIOR INFERIOR | INTERCOSTAL NERVES T9-12 |
| THESE MUSCLES LIE DEEP TO LEVATOR SCAPULA AND UPPER TRAPEZIUS | SERRATUS POSTERIOR SUPERIOR |
| THESE MUSCLES LIE DEEP TO LATISIMUS DORSI | SERRATUS POSTERIOR INFERIOR |
| TRIANGULAR SHAPED MUSCLE WHICH, WHEN PAIRED FORMS A TRAPEZIUM. | TRAPEZIUS |
| MOST SUPERFICIAL MUSCLE OF THE BACK | TRAPEZIUS |
| ORIGIN OF TRAPEZIUS | EXTERNAL OCCIPITAL PROTUBERANCE, LIGAMENTUM NUCHAE, C7-T12 SPINOUS PROCESSES |
| INSERTION OF TRAPEZIUS | UPPER: LATERAL THIRD OF CLAVICLE, ACROMION MIDDLE: SPINE OF SCAPULA LOWER: ROOT OF SPINE OF SCAPULA |
| ACTION OF TRAPEZIUS | UPPER: ELEVATION, UPWARD ROTATION OF SCAPULA MIDDLE: RETRACTION OF SCAPULA LOWER: DEPRESSION, UPWARD ROTATION OF SCAPULA |
| INNERVATION OF TRAPEZIUS | ACCESSORY NERVE (CRANIAL NERVE XI)AND BRANCHES OF C3,4 |
| ORIGIN OF LATISSIMUS DORSI | THORACOLUMBAR APONEUROSIS, LOWER 6 THORACIS SPINOUS PROCESSES, SACRUM AND ILIAC CREST, LOWER 3 TO 4 RIBS, INFERIOR ANGLE OF SCAPULA |
| INSERTION OF LATISSIMUS DORSI | BICIPITAL (INTERTUBERCULAR) GROOVE OF HUMERUS |
| ACTION OF LATISSIMUS DORSI | EXTENSION, MEDIAL ROTATION AND ADDUCTION OF HUMERUS |
| INNERVATION OF LATISSIMUS DORSI | THORACODORSAL NERVE |
| WIDEST MUSCLE OF THE BACK | LATISSIMUS DORSI |
| POWERFUL EXTENSOR OF FLEXED HUMERUS IN SWIMMING OR CHOPPING WITH AN AXE | LATISSIMUS DORSI |
| PULL THE SHOULDER GIRDLE DOWN AND IS ACTIVE WHEN DOING A DESPRESSION TRANSFER OR WHEN USING CRUTCHES | LATISSIMUS DORSI |
| ORIGIN OF TERES MAJOR | INFERIOR ANGLE OF SCAPULA (DORSAL SURFACE) AND LOWER THIRD OF AXILLARY BORDER OF SCAPULA |
| INSERTION OF TERES MAJOR | MEDIAL LIP OF BICIPITAL GROOVE OF HUMERUS |
| ACTION OF TERES MAJOR | EXTENSION, MEDIAL ROTATION, AND ADDUCTION OF HUMERUS |
| INNERVATION OF TERES MAJOR | LOWER SUBSCAPULAR NERVE |
| INSERTS NEAR LATISSIMUS DORSI AND HAS SAME ACTIONS | TERES MAJOR |
| PULLS DOWNWARD TO HELP STABILIZE THE HEAD OF THE HUMERUS DURING ABDUCTION | TERES MAJOR, INFRASPINATUS AND TERES MINOR |
| ORIGIN OF TERES MINOR | UPPER 2/3 OF AXILLARY BORDER OF SCAPULA |
| INSERTION OF TERES MINOR | GREATER TUBERCLE OF HUMERUS |
| ACTION OF TERES MINOR | LATERAL ROTATION AND EXTENSION OF HUMERUS |
| INNERVATION OF TERES MINOR | AXILLARY (CIRCUMFLEX) NERVE |
| "T" OF THE "SIT" MUSCLES | TERES MINOR |
| HELPS REINFORCE THE CAPSULE OF THE SHOULDER JOINT AND IS ONE OF THE "ROTATOR CUFF" MUSCLES | TERES MINOR |
| ORIGIN OF LEVATOR SCAPULA | C1-4 TP'S |
| INSERTION OF LEVATOR SCAPULA | VERTEBRAL BORDER OF SCAPULA FROM SUPERIOR ANGLE TO ROOT OF SPINE |
| ACTION OF LEVATOR SCAPULA | ELEVATION, DOWNWARD ROTATION OF SCAPULA |
| INNERVATION OF LEVATOR SCAPULA | DORSAL SCAPULAR NERVE (C5) AND BRANCHES OF C3,4 |
| ORIGIN OF RHOMBOIDS:MINOR | C7 AND T1 SP'S |
| ORIGIN OF RHOMBOIDS:MAJOR | T2-T5 SPS'S |
| INSERTION OF RHOMBOIDS: MINOR | ROOT OF SPINE OF SCAPULA |
| INSERTION OF RHOMBOIDS:MAJOR | VERTERBRAL BORDER OF SCAPULA FROM ROOT OF SPINE TO INFERIOR ANGLE |
| ACTION OF RHOMBOIDS | RETRACTION AND DOWNWARD ROTATION OF SCAPULA |
| INNERVATION OF RHOMBOIDS | DORSAL SCAPULAR NERVE (C5) |
| THESE MUSCLES WHEN PAIRED FORM A "CHRISTMAS TREE" SHAPE DUE TO THE OBLIQUE AND DOWNWARD DIRECTION OF THEIR FIBERS | RHOMBOIDS |
| ORIGIN OF SUPRASPINATUS | SUPRASPINOUS FOSSA OF SCAPULA |
| INSERTION OF SUPRASPINATUS | GREATER TUBERCLE OF HUMERUS (SUPERIOR FACET) |
| ACTION OF SUPRASPINATUS | ABDUCTION OF HUMERUS, STABILIZATION OF HEAD OF HUMERUS |
| INNERVATION OF SUPRASPINATUS | SUPRASCAPULAR NERVE (C5,6) |
| "SIT" MUSCLES | SUPRASPINATUS, INFRASPINATUS, TERES MINOR |
| THE INSERTION SITE OF THE "SIT" MUSCLES | SUPERIOR, MIDDLE AND INFERIOR FACETS OF GREATER TUBERCLE OF HUMERUS |
| PULLS THE HEAD OF THE HUMERUS INTO THE GLENOID FOSSA AND THUS ACTS AS AN EFFECTIVE STABILIZER FOR HUMERAL ABDUCTION | SUPRASPINATUS |
| ORIGIN OF INFRASPINATUS | INFRASPINOUS FOSSA OF SCAPULA |
| INSERTION OF INFRASPINATUS | GREATER TUBERCLE OF HUMERUS (MIDDLE FACET) |
| ACTION OF INFRASPINATUS | LATERAL ROTATION, EXTENSION OF HUMERUS |
| INNERVATION OF INFRASPINATUS | SUPRASCAPULAR NERVE |
| "I" OF SIT MUSCLES | INFRASPINATUS |
| ORIGIN OF SUBSCAPULARIS | SUBSCAPULAR FOSSA OF SCAPULA |
| INSERTION OF SUBSCAPULARIS | LESSER TUBERCLE OF HUMERUS |
| ACTION OF SUBSCAPULARIS | MEDIAL ROTATION AND ADDUCTION OF HUMERUS |
| INNERVATION OF SUBSCAPULARIS | UPPER AND LOWER SUBSCAPULAR NERVE |
| MUSCLES OF ROTATOR CUFF | SUBSCAPULARIS, SUPRASPINATUS, INFRASPINATUS, TERES MINOR |
| ROTATOR CUFF GUARDS THIS JOINT | GLENOHUMERAL JOINT |
| ONLY ROTATOR CUFF TO INSERT ON LESSER TUBERCLE OF HUMERUS | SUBSCAPULARIS |
| ORIGIN OF PECTORALIS MAJOR | CLAVICULAR HEAD:MEDIAL HALF OF CLAVICLE, STERNAL HEAD:STERNUM, CARTILAGES OF UPPER 6 RIBS |
| INSERTION OF PECTORALIS MAJOR | LATERAL LIP OF BICIPITAL (INTERTUBERCULAR) GROOVE OF HUMERUS |
| ACTION OF PECTORALIS MAJOR: CLAVICULAR HEAD | FLEXION OF HUMERUS |
| ACTION OF PECTORALIS MAJOR: STERNAL HEAD | EXTENSION OF HUMERUS FROM A FLEXED POSITION |
| ACTION OF PECTORALIS MAJOR | ADDUCTION, HORIZONTAL ADDUCTION AND MEDIAL ROTATION OF HUMERUS |
| INNERVATION OF PECTORALIS MAJOR: CLAVICULAR HEAD | LATERAL PECTORAL NERVE |
| INNERVATION OF PECTORALIS MAJOR: STERNAL HEAD | MEDIAL PECTORAL NERVE |
| THIS MUSCLE FORMS THE ANTERIOR WALL OF THE AXILLA | PECTORALIS MAJOR |
| ORIGIN OF PECTORALIS MINOR | ANTERIOR SURFACE OF RIBS 3,4,5 NEAR COSTAL CARTILAGES |
| INSERTION OF PECTORALIS MINOR | CORACOID PROCESS OF SCAPULA ON MEDIAL BORDER OF SUPERIOR SCAPULA |
| ACTION OF PECTORALIS MINOR | PROTRACTION,DEPRESSION, DOWNWARD ROTATION OF SCAPULA |
| INNERVATION OF PECTORALIS MINOR | MEDIAL PECTORAL NERVE |
| ORIGIN OF SUBCLAVIS | 1ST RIB COSTOCARTILAGE JUNCTION |
| INSERTION OF SUBCLAVIS | INFERIOR SHAFT OF CLAVICLE-MIDDLE 1/3 |
| ACTION OF SUBCLAVIS | STABILIZES CLAVICLE BY MOVING IT MEDIALLY |
| INNERVATION OF SUBCLAVIS | NERVE TO SUBCLAVIS |
| THIS MUSCLE PREVENTS EXTREME ELEVATION AND PROTRACTION OF THE CLAVICLE | SUBCLAVIS |
| ORIGIN OF SERRATUS ANTERIOR | OUTER SURFACE OF UPPER 8 RIBS (BY FINGER-LIKE SLIPS_ |
| INSERTION OF SERRATUS ANTERIOR | VERTEBRAL BORDER OF SCAPULA-ANTERIOR SURFACE |
| ACTION OF SERRATUS ANTERIOR | PROTRACTION, UPWARD ROTATION OF SCAPULA, STABILIZES SCAPULA AGAINST CHEST WALL |
| INNERVATION OF SERRATUS ANTERIOR | LONG THORACIC NERVE |
| LOWER FIBERS OF THIS MUSCLE INTERDIGITATE WITH EXTERNAL OBLIQUE | SERRATUS ANTERIOR |
| STRONGEST PROTRACTOR OF SCAPULA | SERRATUS ANTERIOR |
| HOLDS THE SCAPULA AGAINST THE CHEST WALL TO PROVIDE A FIXED ORIGIN FOR MUSCLES ACTING ON THE HUMERUS | SERRATUS ANTERIOR |
| WEAKNESS OF THIS MUSCLE CAUSES "WINGED SCAPULA" | SERRATUS ANTERIOR |
| ORIGIN OF CORACOBRACHIALIS | CORACOID PROCESS OF SCAPULA |
| INSERTION OF CORACOBRACHIALIS | MIDDLE 1/3 OF MEDIAL SURFACE OF HUMERAL SHAFT |
| ACTION OF CORACOBRACHIALIS | FLEXION, ADDUCTION OF HUMERUS |
| INNERVATION OF CORACOBRACHIALIS | MUSCULOCUTANEOUS NERVE (C5,6,7) |
| ORIGIN OF ANTERIOR DELTOID | LATERAL THIRD OF CLAVICLE |
| INSERTION OF ANTERIOR DELTOID | DELTOID TUBEROSITY OF HUMERUS |
| ACTION OF ANTERIOR DELTOID | FLEXION, HORIZONTAL ADDUCTION, MEDIAL ROTATION OF HUMERUS |
| INNERVATION OF ANTERIOR DELTOID | AXILLARY NERVE (CIRCUMFLEX) |
| ORIGIN OF MIDDLE DELTOID | LATERAL ACROMION |
| INSERTION OF MIDDLE DELTOID | DELTOID TUBEROSITY OF HUMERUS |
| ACTION OF MIDDLE DELTOID | ABDUCTION OF HUMERUS TO 90 DEGREES |
| INNERVATION OF MIDDLE DELTOID | AXILLARY NERVE |
| ORIGIN OF POSTERIOR DELTOID | SPINE OF SCAPULA |
| INSERTION OF POSTERIOR DELTOID | DELTOID TUBEROSITY OF HUMERUS |
| ACTION OF POSTERIOR DELTOID | EXTENSION, HORIZONTAL ABDUCTION, LATERAL ROTATION OF HUMERUS |
| MUSCLE THAT FORMS THE ROUNDED MUSCLE BULK OVER THE SHOULDER JOINT | DELTOIDS |
| STRONG ABDUCTOR BUT CANNOT INITIATE THAT MOVEMENT DUE TO THE ANGLE OF PULL IS PARALLEL TO THE HUMERUS WHEN THE ARM IS BY THE SIDE-SEE SUPRASPINATUS | DELTOIDS |
| ORIGIN OF TRICEPS BRACHII | LONG HEAD: INFRAGLENOID TUBERCLE OF SCAPULA LATERAL HEAD: POSTERIOR HUMERUS ABOVE SPIRAL GROOVE MEDIAL HEAD: POSTERIOR HUMERUS BELOW SPIRAL GROOVE |
| INSERTION OF TRICEPS BRACHII | OLECRANON PROCESS OF ULNA |
| ACTION OF TRICEPS BRACHII | EXTENSION OF ELBOW |
| ACTION OF TRICEPS BRACHII LONG HEAD | EXTENSION OF HUMERUS |
| INNERVATION OF TRICEPS BRACHII | RADIAL NERVE |
| ONLY MUSCLE ON THE POSTERIOR ARM | TRICEPS BRACHII |
| ORIGIN OF ANCONEUS | LATERAL EPICONDYLE OF HUMERUS |
| INSERTION OF ANCONEUS | OLECRANON PROCESS AND UPPER POSTERIOR SURFACE OF ULNA |
| INNERVATION OF ANCONEUS | RADIAL NERVE |
| ACTION OF ANCONEUS | ASSISTS EXTENSION OF ELBOW |
| ORIGIN OF BRACHIALIS | LOWER HALF OF ANTERIOR SHAFT OF HUMERUS |
| INSERTION OF BRACHIALIS | TUBEROSITY OF ULNA AND CORONOID PROCESS OF ULNA |
| ACTION OF BRACHIALIS | FLEXION OF ELBOW |
| INNERVATION OF BRACHIALIS | MUSCULOCUTANEOUS NERVE (C5,6,7) AND SOMETIMES BRANCHES FROM RADIAL AND MEDIAN NERVES |
| STRONGEST ELBOW FLEXOR | BRACHIALIS |
| ORIGIN OF BICEPS BRACHII | SHORT HEAD: CORACOID PROCESS OF SCAPULA LONG HEAD: SUPRAGLENOID TUBERCLE OF SCAPULA |
| INERSTION OF BICEPS BRACHII | TUBEROSITY OF RADIUS AND BICIPITAL APONEUROSIS |
| ACTION OF BICEPS BRACHII | FLEXION OF ELBOW AND SUPINATION OF FOREARM |
| ACTION OF BICEPS BRACHII SHORT HEAD | FLEXION OF HUMERUS |
| INNERVATION OF BICEPS BRACHII | MUSCULOCUTANEOUS NERVE (C5,6,7) |
| CORACOID PROCESS IS THE ORIGINATION SITE FOR | BICEPS BRACHII SHORT HEAD AND THE CORACOBRACHIALIS MUSCLES |
| CORACOID PROCESS IS THE INSERTION SITE FOR | PECTORALIS MINOR |
Created by:
chengel
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