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Download Cat Muscle WebQuest 2010 - YISS-Anatomy2010-11
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Muscles that we will study in the cat dissection Below are listed the muscles you must be able to identify on the cat lab practical exam following dissection. Completing the chart will help to identify them on your cat as you dissect. You are required to know the origins, insertions and actions of these muscles. To get ready for dissection you should complete the chart including the origins, insertions and actions for each muscle. Also, cut and paste a picture of the dissected muscle onto the chart (find this on the web). This is independent work; while documents will look similar, no two documents should be the same. The chart is due on Wednesday December 1st by class. Also, bring a printed copy for use when we dissect, after Christmas. Go to these websites for information and pictures, you will need to use more than one to get all your information and pictures. http://www.saddleback.edu/faculty/charrison/smmuscles.html http://www.mhhe.com/biosci/ap/cat_dissect/cat_demo/index.html http://bio.bd.psu.edu/cat/Muscular_System/index.htm http://homes.bio.psu.edu/people/faculty/strauss/anatomy/musc/muscular.htm Muscle Origin Insertion Action Muscle Origin Insertion radial tuberosity Action Biceps brachii coracoid process, supraglenoid tubercle flexes elbow, supinates forearm Biceps femoris ischial tuberosity and femur tibia and fibula extends thigh, flexes knee Brachialis distal anterior humerus coronoid process of ulna flexes forearm Muscle Origin Insertion Action Compresses abdominal contents, assists in flexion and rotation of vertebral column Plantar flexes the foot External obliques Lower eight ribs Linea alba, aponeurosis of the external abdominal oblique Gastrocnemius Lateral and medial condyle of the femur calcaneus Gluteus maximus Posterior ilium, sacrum, and coccyx Iliotibial tract, fluteal tuberosity of femur Extends and laterally rotates hip Muscle Origin Insertion Action Gracilis Inferior ramus and body of the pubis Medial surface of tibia Adducts thigh at hip; flexes leg at knee Infraspinatus Infraspinous fossa of scapula Greater tubercle of the humerus Laterally rotates arm Internal obliques Lumbodorsal fascia, iliac crest Linea alba, aponeurosis of internal oblique Same as external oblique Latissimus dorsi Lumbodorsal fascia via thoracic and lumbar vertebrae, sacrum, ilium Intertuburcular groove of the humerus Extends, adducts, and medially rotates arm Muscle Origin Insertion Action Masseter Zygomatic arch mandible Elevates mandible Pectoantebrachialis (not found in humans) Manubrium of sternum Fascia of forearm Adducts forelimb Pectoralis major Sternum. Clavicle, and ribs Greater tubercle and along intertubercular groove of the humerus Flexes, medially rotates, and adducts arm Muscle Pectoralis minor Pronator teres Rectus abdominis Origin Ribs 3-5 Medial epicondyle of the humerus Pubic crest pubic symphysis and Insertion Action Corocoid process of the scapula Depresses and pulls scapula anteriorly radius Ribs and xiphoid process Pronates forearm Flexes vertebral column, compresses abdominal contents Muscle Origin Insertion Action Flexes, laterally rotates thigh; flexes and medially rotates leg at the knee Extends thigh at hip; flexes and mideally rotates leg at knee Arm abduction Sartorius Anterior superior iliac spine Medial tibia Semitendinosus Ischial tuberosity Medial tibia Supraspinatus Supraspinous fossa of the scapula Greater tubercle of the humerus Muscle Insertion Action Anterior superior iliac spine, iliac crest Iliotibial tract Flexes and abducts thigh Teres major Inferior angle of scapula Lesser tubercle of the humerus Teres minor Lateral border of scapula Greater tubercle of the humerus Adducts, extends, and medially rotates arm Laterally rotates arm Tensor latae Origin fasciae Muscle Triceps brachii Xiphihumeralis (not found in humans) Origin Insertion Action Long head: infraglenoid tubercle of the scapula Lateral head: posterior humerus Medial head: posterior humerus Olecranon process of the ulna Extends arm and forearm Xiphoid process of sternum Proximal end of humerus Forearm extension Forearm extentsion Adducts forelimb
