Muscles Dissection Flashcards
Cutaneous trunci
Origin: superficial trunk fascia
Insertion: superficial shoulder fascia and medial surface of humerus
Action: makes the skin twitch
Masseter
Origin: zygomatic arch
Insertion: mandible
Action: moving the lower jaw
External abdominal oblique
Origin: ribs and lumbosacral fascia
Insertion: ventral midline
Action: runs caudoventral
Internal abdominal oblique
Origin: Lilium and lumbodorsal fascia
Insertion: ventral midline
Action: runs cranioventral
Rectus abdominis
Origin: first and second ribs
Insertion: ventral midline
Action: forms a floor
Latissimus dorsi
Orgin: fourth-sixth lumbar vertebrae
Insertion: humerus
Action: flex the shoulder and propel the leg caudally
Pectorals
Origin: sternum
Insertion: humerus
Action: adduct the forelimb
Deltoids
Origin: scapula
Insertion: humerus
Action: abduct and flex the shoulder joints
Brachialis
Origin: lateral surface of humerus
Insertion: proximal end of the ulna
Action: flex the forearm
Biceps brachii
Origin: glenoid fossa of scapula
Insertion: radial tuberosity
Action: the flex (bend) the elbow
Triceps brachii
Origin: humerus
Insertion: olecranon process of ulna
Action: to extend (straighten) the elbow
Gluteal muscles
Origin: ilium and associated fascia
Insertion: greater trochanter of femur
Action: extend the hip joint and propel the body forward
Biceps femoris
Origin: ischium
Insertion: tibia and patella
Action: extend hip joint and propel body forward
Semimembranosus
Origin: ischium
Insertion: distal end of tibia
Action: extend hip joint and propel body forward
Semitendinosus
Origin: ischium
Insertion: proximal end of tibia
Action: extend hip joint and propel body forward
