Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
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

U2: Muscles II

QuestionAnswer
Muscles that act on the Anterior and Lateral abdominal wall and trunk walls have fascia, 4 pairs of sheet-like muscles-rectus abdominus, external oblique, internal oblique, transversus abdominis. Offer support, flex of trunk & column, lateral bend & rotate, increase pressure.
Rectus abdominis most medial & anterior of ab wall/trunk muscles. Runs vertically along anterior abdomen; compression of abdomen (childbirth, vomiting, defecation, situps)
External oblique most superficial of anterolateral aspect of ab wall; fibers run at an angle; compresses abdomen, helps rotate and laterally bend trunk.
Internal oblique anterolateral ab wall between external oblique & transversus abdominis; fibers run at an angle; compresses abdomen, helps rotate and laterally bend trunk.
Transversus abdominis deepest of anterolateral ab muscles; fibers run horizontally; compresses abdomen
Muscles used in breathing diaphragm, external intercostals, internal intercostals
Diaphragm used in breathing; thoracic cavity floor. Relaxed=dome shaped;contracted=flat,primary muscle for inhalation/inspiration;voluntary (forced breath)/involuntary. Phrenic nerve innervation. Can increase intra-abdominal pressure
External intercostals between ribs; elevate ribs, thus increasing volume of thoracic & pleural cavities & facilitating inspiration; synergists of diaphragm
Internal intercostals between ribs, but run at opposite angle of external intercostals; depress ribs during forced expiration (exhalation)
Muscles of Pelvic Floor include pelvic diaphragm, urogentical diaphragm, both are sheets of muscles that support pelvic organs (uterus, urinary bladder)
Muscles that move the shoulder pectoralis minor, serratus anterior, trapezius, rhomboids
Pectoralis minor deep to pectoralis major in upper chest; insertion is scapula; protracts (pulls forward) shoulder, specifically the scapula
Serratus anterior “boxer’s muscle”-deep and inferior to pectoral muscles on lateral aspect of rib cage; runs from lateral chest toward shoulder; insertion is scapula. Protracts (pulls forward) shoulder, esp. scapula
Trapezius large, superficial muscle in upper & middle back; upper fibers run inferiorly toward scapula, middle run horizontally toward scapula, lower run superiorly toward scapula. Insertion-scapula. Elevates, depresses, adducts, retracts scapula and shoulder
Rhomboids two rectangular muscles lying deep to trapezius; insertion is scapula; along with middle fibers of trapezius, retract scapula thereby “squaring shoulders”
Muscles that move arm (humerus) pectoralis major, latissimus dorsi, deltoid, rotator cuff muscles
Pectoralis major large, superficial muscle of chest; insertion is humerus; flexes & adducts arm; pulls arm forward across chest
Latissimus dorsi broad, flat, superficial muscle that extends from lower back to upper arm; insertion humerus; extends and adducts arm; draws arm backward and downward
Deltoid forms much of fleshy portion of the shoulder area; common site for intramuscular injections. Insertion-deltoid tuberosity of humerus; abducts arm
Rotator cuff four different specific muscles-supraspinatus, infraspinatus, teres minor, subscapularis; muscles & tendons strengthen, stabilize shoulder joint; form nearly complete circle around shoulder joint
Supraspinatus muscle of rotator cuff; lies superior to scapular spine on posterior scapula; deep to trapezius; helps hold head of humerus in glenoid cavity of scapula and thereby stabilizes shoulder joint
Infraspinatus muscle of rotator cuff; lies inferior to scapular spine on posterior scapula; helps hold head of humerus in glenoid cavity of scapula and thereby stabilizes shoulder joint.
Teres minor muscle of rotator cuff; small muscle inferior to infraspinatus; helps hold head of humerus in glenoid cavity of scapula and thereby stabilizes shoulder joint
Subscapularis muscle of rotator cuff; lies against anterior aspect of scapula; helps hold head of humerus in glenoid cavity of scapula and thereby stabilizes shoulder joint
Muscles that move forearm insert on radius or ulna; sheets of fascia separate the muscles in arm into anterior & posterior compartments; anterior-flexors of forearm; posterior-extend. Biceps brachii, brachialis, triceps brachii, brachioradialis, supinator, pronator teres
Biceps brachii two-headed superficial muscle in anterior arm; origin-2 parts of scapula, one of which is coracoid process; insertion-radial tuberosity; action-flexes forearm
Brachialis lies deep to biceps brachii in anterior arm; flexes forearm, synergist of biceps brachii.
Triceps brachii three headed muscle in posterior arm; insertion is olecranon process of ulna; extends forearm
Brachioradialis superficial, lateral forearm; forms lateral border of cubital fossa; extends from distal humerus to distal radius; insertion is styloid process on distal radius; flexes forearm; synergist of biceps brachii and brachialis
Supinator deep forearm; insertion is radius; supination (turns forward and palm forward or upward)
Pronator teres located in anterior forearm; insertion is radius; pronation (turns forearms and palm backward or downward)
Muscles that move the hand (wrist/carpals, palm/metacarpals, fingers/phalanges) most muscles located in forearm; have long tendons that extend to hand, primarily allowing them to flex and extend wrist and fingers.
Flexors of the wrist and fingers in anterior forearm; mainly innervated by median nerve; include flexor carpi radialis, palmaris longus, flexor carpi ulnaris
Extensors of the wrist and fingers located in posterior forearm; innervated by radial nerve; include extensor carpi radialis (extends wrist); extensor digitorum (digits except thumb); extensor carpi ulnaris (wrist)
Muscles that move the thigh (femur) and/or leg (tibia) iliopsoas, Sartorius, quadriceps femoris muscle group, tensor fascia latae, gracilis, adductor muscle group, gluteus maximus, gluteus medius, hamstring muscle group
Iliopsoas muscle that moves thigh and/or leg. Composite of 2 muscles, iliacus & psoas major, which exten from the ilium and vertebral column, respectively, to the anterior thigh.
Iliacus origin-ilium of hip bone; insertion-femur; action-flexion of thigh
Psoas major origin-lumar vertebrae; insertion-femur; action-flexion of thigh; cut of meat-tenderloin
Sartorius strap-like superficial muscle that runs obliquely across anterior surface of thigh to knee. Action-helps produce cross legged position
Quadriceps femoris muscle group 4 muscles that form bulk of front & sides of thigh; all have a common tendon that extends to patella, then patellar ligament extends to tibial tuberosity. Rectus femoris, vastus lateralis, vastus medialis, vastus intermedius
Rectus femoris part of quadriceps femoris muscle group; superficial muscle of anterior thigh; runs straight down thigh; insertion-tibial tuberosity via patellar ligament; extends leg; innervation-femoral nerve
Vastus lateralis part of quadriceps femoris muscle group;forms lateral aspect of thigh; common site for intramuscular injections, esp. in children; insertion-tibial tuberosity via patellar ligament; extends leg; innervation-femoral nerve
Vastus medialis part of quadriceps femoris muscle group; forms inferomedial aspect of thigh; insertion-tibial tuberosity via patellar ligament; extends leg; innervation-femoral nerve
Vasus intermedius part of quadriceps femoris muscle group; lies between vastus lateralis & vastus medialis; deep to rectus femoris; insertion-tibial tuberosity via patellar ligament; extends leg; innervation-femoral nerve
Tensor fasciae latae located in anterolateral thigh, insertion-iliotibial tract/band
Gracilis long, thin, superficial muscle of most medial aspect of thigh; adduction of thigh.
Adductor muscle group muscle group located in medial thigh; all in this group insert on femur, adduct thigh, and are used to press thighs together; strain of this group is a “pulled groin;” includes adductor longus and adductor magnus
Gluteus maximus largest and most superficial of butt muscles; forms most of buttock mass; overlies sciatic nerve. Insertion-gluteal tuberosity on posterior femur; extends thigh
Gluteus medius lateral part of butt; common site for intramuscular injections; insertion-lateral femur (specifically greater trochanter); abducts thigh
Hamstring muscle group 3 muscles that form bulk of posterior thigh; strained “pulled” hamstrings-common sports injury in hard-running athletes. Includes biceps femoris, semitendinosus; semimembranosus
Biceps femoris most lateral member of hamstring muscle group; origin-ischial tuberosity, insertion-tibia; flexion of leg and extension of thigh; innervation-sciatic nerve
Semitendinosus part of hamstring group; lateral to biceps femoris; origin-ischial tuberosity; insertion-tibia; flexion of leg and extension of thigh; innervation-sciatic nerve
Semimembranosus part of hamstring group; lies deep to semitendinosus; origin-ishcial tuberosity; insertion-tibia; flexion of leg and extension of thigh; innervation-sciatic nerve
Muscles that move the foot most muscles are located in leg; sheets of fascia separate these leg muscles into anterior, lateral, posterior compartments; in ankle, bands of fascia are arranged like ankle bracelets & help hold distal tendons of these muscles in place.
Tibialis anterior muscle that moves foot; superficial, anterior leg; immediately lateral to tibia’s anterior crest; insertion-some foot bones; dorsiflexes foot; swelling of tibialis anterior and associated pain=shin splints
Extensor digitorum longus muscle that moves foot; lateral to tibialis anterior; extends all toes, except big toe (hallux)
Gastrocnemius muscle that moves foot; large superficial muscle of posterior leg (calf); insertion-calcaneus via calcaneal/Achilles tendon; plantar flexes foot
Soleus muscle that moves foot; lies deep to gastrocnemius; insertion-calcaneus via calcaneal/Achilles tendon; plantar flexes foot
Charley horse common sports injury characterized by tearing of a muscle , bleeding into the surrounding tissues, and severe pain
Created by: mbtrimm