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chp 11 muscles
Bio 260 ch 11/appendicular muscles/ martini/brulte
| Question | Answer |
|---|---|
| What are the 2 major groups of appendicular mucles | 1) pectoral girdle/ upper limbs2) pelvic girdle /lower limbs |
| What is the FX of appendicular muscles? | stabilize pectoral and pelvic girdle & move upper/lower limbs |
| What has the pelvic girdle evolved to do? | transfer the weight from axial to appendicular skeleton |
| Name the 4 divisions fot he pectoral girdle/upper limbs: | 1) muscles that position the pectoral girdle2) muscles of upper arm3) muscles of forearm and wrist4) muscles of the hand & fingers |
| Name the 7 muscles that position the pectoral girdle | LT would like to Sub Serrate & Pec Major/Minor Runners: L= levator scapulae T= trapeziusSub = subclaviusSerrate= serratus anteriorPec= pectoralis minorRunner= Major/minor rhomboid |
| Where is the Levator scapulae located? | O= transverse processes of C1-C4I= vertebral border of scapulaA= elevate scapula (shrug shoulders) |
| Removing the trapezius reveals the ____ and the ____ | Minor/major Rhomboidlevator scapulae |
| Where do the Rhomboids Originate? | spinous processes of C7 (minor) to thoracic spine |
| Where do the Rhomboids insert to move? | vertebral border of scapulaeFX: adduct (move towards the midline) and perform downward rotation of scapulae |
| What is the fan shaped muscle on the lateral (side) wall of chest? | serratus anterior |
| What is the origin of serratus anterior? | anterior/superior margins of ribs 1-9 |
| What is the insert of serratus anterior? | anterior surface of vertebral border of scapulae |
| What is the action of serratus anterior | protract or abduct (bring shoulders as far forward or anteriorly); Kyphosis reflects protracted shoulder |
| Name the 2 deep chest muscles | 1) pectoralis minor2) subclavius |
| What is the origin of subclavius ? | O= first rib |
| What is the insert of subclavius? | inferior border of clvicle |
| What is the Action of subclavius? | depress and protract the shoulder |
| What is the Insert of the Pectoralis minor? | coracoid Process of scapulaFX: depress and protract shoulder |
| The origin of the ______ minor is on the anterior (front) surface of ribs 3-5 | pectoralis |
| The small _______ is the only arm muscle attached to scapulae that produces flexion and adduction at shoulder joint. | coracobrachialis |
| The ______ muscle assists the Deltoid muscle when abducting the arm | supraspinatus |
| The subscapularis and ___ ___rotate the arm medially | teres major |
| The origin and action of the subscapularis is: | O = subscapular fossaI = lesser tubercle of humerus |
| Name the 4 rotator cuff muscles: | Supraspinatus, Infraspinatus,Teres minor & subscapularis |
| The ___ and Teres Major rotate the arm laterally | infraspinatus |
| The rotator cuff muscles of ___,___,___ insert into greater tubercle of humerus. | Supraspinatus, Infrspinatus, Teres Minor |
| Like the coracobrachialis muscle, the ___head of the biceps originates from coracoid processof scapula | short |
| The pectoralis _____ origin is on the cartilage ribs 2-6,body of sternum,and inferior clavicle | major |
| The ____ ___ action is extension(increase angle between 2 joints/bones),adduction and medial rotation of shoulder | lattisimus dorsi |
| The origin of Latissimus Dorsi is the ___ ___ of thopracic and lumbar vertebrae, ribs 8-12 | spinous process |
| Latissimus Dorsi inserts on ____ ___ of humerus | intertubercular groove |
| The ___ ___ flexes the shoulder joint and the latissimus dorsi ___ it. | pectoralis major / extends |
| Rotator cuff tendons support the shoulder joint capsule and ___ the range of movement. | limit |
| Most muscles that move forarm and wrist originate on ____ and insert on the ___ and ___ muscles. | O= humerusI = radial,ulnar,carpal (forearm and wrist) |
| The long head of triceps brachii originates on ____ | infraglenoid tubercle of scapula |
| All 3 tricep heads insert on ____ | olecranon of ulna |
| The ___ head of triceps originates on superior,lateral margin of humerus. | lateral |
| The medial head of triceps originate on ____ | posterior surface of humerus |
| Triceps action are as ____ which is antagonistic to biceps. | extensors;antagonistic to bicep flexors |
| The long head of biceps brachii originate on ___ | supraglenoid tubercle of on scapula |
| Both bicep heads insert on __ ___ | radial tuberosity |
| Bicep action is ____ | flexion at elbow & shoulder, supination |
| The triceps brachii ___ the elbow when doing push ups. | extend |
| We are strongest when the forearm is __ and the biceps flexes. | supinated |
| When the forearm is pronated (faces anteriorly),the ____ cannot function effectively due to its insertion. | biceps brachii (example is doing a pull up) |
| The brachialis and brachioradialis __ the elbow | flex; triceps is antagonistic |
| Name 3 superficial muscles that work together to flex wirst. | Flexor carpi ulnaris; Flexor carpi radialis; palmaris longus |
| Flexor carpi radialis flexes and ___,while flexor carpi ulnaris flexes and ___ | radialis- abducts / ulnaris- adducts |
| Extensor carpi radialis action is: | extension & abduction (move away from midline) |
| Extensor carpi ____ produces extension and adduction (moving towards the midline) | ulnaris |
| Pronator teres muscle originates on ___ epicondyle of humerus | medial |
| Supinator originates on ___ epicondyle of humerus and supinates ___ and hand___ | lateral/ forearm and hand |
| In general, extensors are along the ___ and ___ surfaces of the forearm. | posterior and lateral |
| Forearm ___ are found on the anterior and medial surfaces. | flexors |
| Pronator teres and supinator insert on ___ and cause rotaion without flexing or extending the elbow. | radius |
| What causes carpal tunnel syndrome? | inflammation of retinaculum restricts movement;median nerve is irritated |
| Forearm muscles that provide strength and crude cobntrol of the hand are ___ muscles | extrinsic |
| Small Intrinsic hand muscles is for __ control | fine |
| Small intrinsic muscles originate on the __ and ___ bones. | carpal/ metacarpal |
| No muscles originate on the phalanges. T or F | true |
| What are the SX of carpal tunnel syndrome? | wrist flexion pain,tingling sensation,numbness on the palm |
| What is the TX for carpal tunnel syndrome? | aspirin,anti inflammatory,use of a splint to prevent movement of wrist |
Created by:
mich826
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