Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Ch 10 Muscle Action
| Question | Answer |
|---|---|
| O-epicranial aponeurosis: I- skin of eyebrows and root of nose. Raises the eyebrows | Frontal belly |
| Fixes Aponeurosis and pulls scalp posteriorly | Occipital belly |
| Draws eyebrows medially and inferiorly (angry eyebrows) | Corrugator supercilii |
| Closes eyes | Orbicularis oculi |
| Raises lateral corners of mouth (smile) | Zygomaticus |
| Draws corners of lips laterally | Risorius |
| Opens lips ; raises and furrows upper lip | Levator labii superioris |
| Draws lower lip inferiorly (as in a pout) | Depressor labii inferioris |
| Draws corners of mouth down and laterally (grimace) | Depressor anguli |
| Closes lips: purses and protrudes lips; kissing and whistling | Orbicularis oris |
| Wrinkles chin; protrudes lower lip (like a pout) | Mentalis |
| Compresses cheeks (sucking) holds food between teeth during chewing | Buccinator |
| Tenses skin of neck (as during shaving) | Platysma |
| Prime mover of jaw closure | Masseter |
| Closes jaw; elevates an retracts mandible | Temporalis |
| Acts with the lateral pterygoid muscle to protract (pull anteriorly) the mandible and promote side to side grinding | Medial pterygoid |
| Provides sliding and side to side grinding movements of the lower teeth | Lateral pterygoid |
| compresses the cheeks | buccinator |
| Protracts tongue | Genioglossus (geni = chin) (glossus =tongue) |
| Depresses tongue | Hyoglossus (hyo=pertaining to hyoid bone) |
| Retracts and elevates tongue | Styloglossus (stylo= pertaining to styloid) |
| Opens mouth and depress mandible | Digastric (di = two, gaster= belly) |
| elevates and retracts hyoid | Stylohyoid |
| Constricts pharynx during swallowing | Superior, middle, and inferior paryngeal constrictor muscles |
| Flexes and laterally rotates the head . O- manubrium of sternum and medial portion of clavicle. I- mastoid process of temporal bone and superior nucal line of occipital bone. | Sternocleidomastoid (sterno= breastbone; cleido= clavicle; mastoid =mastoid process) |
| Extend or hyperextend head | Splenius (splenion= bandage, caput = head; cervi= neck) |
| Extend and laterally flex the vertebral column | Iliocostalis (ilio= illium; cost= rib; thorac= thorax) |
| Thoracis and cervics act together to extend and laterally flex vertebral column; capitis extends head and turns the face towards same side | Longissimus (longissimus = longest) |
| Extends verebral column | Spinalis (spin= vertebral column, spine) |
| Pull ribs toward one another to elevate rib cage | External intercostals (external= outside, inter= between, cost= rib) |
| Draw ribs together and depress rib cage | Interal intercostals |
| Prime mover of inspiration | Diaphragm (dia= across, phragm= partition) |
| Flex and rotate lumbar region of vertebral column | Rectus abdominis (rectus= straight; abdom = abdomen) |
| Flex vertebral column and compress abdominal wall | External oblique (oblique= running at an angle) |
| As for external oblique | Internal oblique |
| Compresses abdominal contents | transversus abdominis (transverse = running straight across) |
| Supports and maintains postion of pelvic organs | Levator ani (levator= raises, ani= anus) |
| Supports pelvic organs; supports coccyx and pulls it forward | Coccygeus (coccy= coccyx) |
| supports pelvic organs; steadies central tendon | Deep transverse perineal muscle (perine= near anus) |
| Constricts urethra; allows voluntary inhibition of urination | External urethral sphincter (sphin= squeeze) |
| Retards venous drinage and maintains erection of penis or clitoris | Ishiocavernosus (ischi= hip; caverna= hollow chamber) |
| Empties male urethra; assists in erections | Bulbospongiosus (bulbon= bulb, spongio= sponge) |
| Stabilizes and strengthes central tendon of perineum | Superficial transverse perineal muscles (superficial= close to surface) |
| With ribs fixed, draws scapular forward and downward | Pectoralis minor (pectu= chest, minor= lesser) |
| Rotates scapula so its inferior angle moves laterally and upward | Serratus anterior (serratus= saw) |
| Stabilizes, elevates, retracts, and rotates scapula | Trapezius (trapezion= irregular four sided figure) |
| Elevates/adducts scapular | Levator scapulae (levator= raises) |
| Stabilize scapula | Rhomboids (rhomboid= diamond shaped) |
| Adducts and medially rotates arm. O- sternal end of clavicle, sternum, cartilage of ribs and aponeurosis of external oblique muscle. I- fibers converge to insert by a short tendon into intertubercular sulcus and greater tubercle of humerus. | Pectoralis major (pectus= breast, major= larger) |
| Prime mover of arm abduction when all its fibers contract simultaneously. O- embraces insertion of the trapeziu; lateral third of clavicle; acromion of spine and scapular. I- deltoid tuberosity of humerus | Deltoid (delta= triangular) |
| Prime mover of arm extension; powerful arm adductor medially rotates arm at shoulder. O- indirect attachment via lumbodorsal fascia into spines of lower six thoracic vertebrae, lower 3 to 4 ribs and iliac crest. I- floor of interuberular sulcus of humerus | Latissimus dorsi (latissimus= widest; dorsi = back) |
| Cheif medial rotator of arm | Subscapularis (sub under; scapular= scapula) |
| Intiates abduction of arm. O-supraspinous fossa of scapula. I- superior part of greater tubercle of humerus | Supraspinatus (supra= abov, spin= spine) |
| Rotates arm laterally . O- infraspinous fossa of scapula. I- greater tubuercle of humerus posterior to insertion of supraspinnatus. | Infraspinatus (infra= below) |
| Same actions as infraspinatus muscle. O-lateral border of dorsal scapular surface. I-greater tubercle of humerus inferior to infraspinatus insertion | Teres minor (teres= round; minor= lesser) |
| Extends medially rotates and adducts arm. O- posterior surface of scapula at inferior angle. I- crest of lesser tubercle on anterior humerus; insertion tendon fused with that of latissimus dorsi | Teres major |
| Flex and adducts arm | Coracobrachialis (coraco= coracoid; brachi= arm) |
| Powerful forearm extensor. O-long head infraglenoid tubercle of scapula; lateral head posterios shaft of humerous. I- by common tendon into olecranon of ulna | Triceps brachii (triceps = three heads, brachi= arm) |
| May control ulnar abduction during forearm pronation | Anconeus (ancon= elbow) |
| Flexes and supinates forearm. O- short head: coracoid process. Long head: supraglenoid tubercle and lip of glenoid cavity. I- by common tendon into radial tuberosity | Biceps brachii (biceps= two heads) |
| A major forearm flexor. O- front of distal humerus; embraces insertion of deltoid muscle. I-coronoid process of ulna and capsule of elbow joint. | Brachialis |
| Synergist in flexing forearm. O- lateral supracondylar ridge at distal end of humerus. I- base of radial styloid process | Brachioradialis (radi= radius) |
| Pronates forearm | Pronator teres (pronation= turning pal posteriorly or down; teres= round) |
| Powerful flexor and abductor of hand | Flexor carpi radialis |
| Tenses skin and fascia of pal during hand movements | Palmaris longus (palma= palm; longus= long) |
| Powerful flexor and adductor of hand | Flexor carpi ulnaris (ulnar= ulna) |
| Flexes wrist and middle phalanges of second to fifth fingers | Flexor digitorum superficialis (digit= finger, toe, superficial = close to surface) |
| Extends hand in conjuction with extensor capir ulanris and abducts hand in conjection with flexor capir radialis | Extensor carpi radalis longus (extend = increase angle between two bones) |
| Extend and abducts hand | Extenros capri radialis brevis (brevis= short) |
| Prime mover of finger extension | Extensor digitorum |
| Assists biceps brachii to forcibly supinate forearm | Supinator (supination= turning palm anteriorly or upward) |
| Abducts and extends thumb | Abductor pollicis longus (abducts= movement away from median plane) |
Created by:
cshelly