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Muscle Flashcards
Muscle Flashcard
23
Health Care
Undergraduate 1
09/11/2015

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Cards

Term
Masseter
Definition
Term
Sternocleidomastoid
Definition
Term
Deltoid
Definition
Term
Pectoralis Major
Definition
Term
Biceps Brachii
Definition
Origin
Short head: tip of coracoid process of scapula; Long head: supraglenoid tubercle of scapula

Insertion
Tuberosity of radius and fascia of forearm via bicipital aponeurosis

Action
Supinates forearm and, when it is supine, flexes forearm
Term
Brachioradialis
Definition
Origin
Proximal 2/3 of lateral supracondyle ridge of humerus

Insertion
Lateral surface of distal end of radius

Action
Flexes forearm
Term
Triceps Brachii
Definition
Term
Trapezius
Definition
Term
Rectus Abdiminis
Definition
Term
Rectus Femoris
Definition
Origin
Straight head from anterior inferior iliac spine; reflected head from groove just above acetabulum

Insertion
Base of patella to form the more central portion of the quadriceps femoris tendon

Action
Extends the knee
Term
Sartorius
Definition
Origin
Anterior superior iliac spine

Insertion
Superior aspect of the medial surface of the tibial shaft near the tibial tuberosity

Action
Flexes and laterally rotates the hip joint and flexes the knee
Term
Vastus Medialis
Definition
Origin
Inferior portion of intertrochanteric line, spiral line, medial lip of linea aspera, superior part of medial supracondylar ridge of femur, and medial intermuscular septum

Insertion
Medial base and border of patella; also forms the medial patellar retinaculum and medial side of quadriceps femoris tendon

Action
Extends the knee
Term
Vastus Lateralis
Definition
Origin
Superior portion of intertrochanteric line, anterior and inferior borders of greater trochanter, superior portion of lateral lip of linea aspera, and lateral portion of gluteal tuberosity of femur

Insertion
Lateral base and border of patella; also forms the lateral patellar retinaculum and lateral side of quadriceps femoris tendon

Action
Extends the knee
Term
Rhombiods
Definition
Term
Lattissimus Dorsi
Definition
Term
Gluteus Maximus
Definition
Origin:Posterior aspect of dorsal ilium posterior to posterior gluteal line, posterior superior iliac crest, posterior inferior aspect of sacrum and coccyx, and sacrotuberous ligament
Insertion:Primarily in fascia lata at the iliotibial band; also into the gluteal tuberosity on posterior femoral surface
Action:Major extensor of hip joint, assists in laterally rotating the thigh; upper and middle third section of the muscle are abductors
Term
Gracilis
Definition
Origin:Inferior margin of pubic symphysis, inferior ramus of pubis, and adjacent ramus of ischium
Insertion:Medial surface of tibial shaft, just posterior to sartorius
Action:Flexes the knee, adducts the thigh, and helps to medially rotate the tibia on the femur
Term
Biceps Femoris Long Head
Definition
Origin
Common tendon with semitendinosus from superior medial quadrant of the posterior portion of the ischial tuberosity

Insertion
Primarily on fibular head; also on lateral collateral ligament and lateral tibial condyle

Action
Flexes the knee, and also rotates the tibia laterally; long head also extends the hip joint
Term
Semitendinosus
Definition
Origin
From common tendon with long head of biceps femoris from superior medial quadrant of the posterior portion of the ischial tuberosity

Insertion
Superior aspect of medial portion of tibial shaft

Action
Extends the thigh and flexes the knee, and also rotates the tibia medially, especially when the knee is flexed
Term
Semimembranosus
Definition
Origin
Superior lateral quadrant of the ischial tuberosity

Insertion
Posterior surface of the medial tibial condyle

Action
Extends the thigh, flexes the knee, and also rotates the tibia medially, especially when the knee is flexed
Term
Gastrocnemius
Definition
Origin:
Medial head from posterior nonarticular surface of medial femoral condyle; Lateral head from lateral surface of femoral lateral condyle
Insertion:The two heads unite into a broad aponeurosis which eventually unites with the deep tendon of the soleus to form the Achilles tendon, inserting on the middle 1/3 of the posterior calcaneal surface
Action:Powerful plantar flexor of ankle
Term
Tibialis Anterior
Definition
Origin
Lateral condyle of tibia, proximal 1/2 - 2/3 or lateral surface of tibial shaft, interosseous membrane, and the deep surface of the fascia cruris

Insertion
Medial and plantar surfaces of 1st cuneiform and on base of first metatarsal

Action
Dorsiflexor of ankle and invertor of foot
Term
Biceps Femoris Short Head
Definition
Origin
Lateral lip of linea aspera, lateral supracondylar ridge of femur, and lateral intermuscular septum of thigh

Insertion
Primarily on fibular head; also on lateral collateral ligament and lateral tibial condyle

Action
Flexes the knee, and also rotates the tibia laterally; long head also extends the hip joint
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