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Anatomy 30 Lab Exercise 12 – Muscular System I. Lab Objectives A. Name and locate major muscles of the body B. Describe the actions of the muscles Activities – Label the following muscles on the attached muscle model pictures. Describe the actions of each muscle listed below. We will look at associated muscles of a cat in lab. The cat muscles can also be viewed on the Penn State Anatomy web site at: http://www.bio.psu.edu/people/faculty/strauss/anatomy/musc/muscular.htm. Animations of muscle actions can be viewed at: http://www.getbodysmart.com. Head & shoulders model Orbicularis oculi Orbicularis oris Masseter Temporalis Sternocleidomastoid Platysma Ventral Torso Model, Tiny Tim, & Cat (Note that the Tiny Tim model shows superficial muscles on its right side and deep muscles on its left side in the torso region.) Pectoralis major Pectoralis minor Serratus anterior (ventralis) External intercostals Internal intercostals Diaphragm (internal) Rectus abdominis 2 External oblique Internal oblique Transversus abdominis (internal) Linea alba (a tendinous sheath) Tiny Tim muscle model (anterior) Tiny Tim muscle model (posterior) Posterior Torso Model, Tiny Tim, & Cat Trapezius Latissimus dorsi Rhomboids Teres major Infraspinatus Gluteus maximus Gluteus medius Complete the Lab 12 Review Sheets on pp. 143-147. 3 Arm model & Cat Deltoid Biceps brachii Brachialis Brachioradialis Triceps brachii Arm & Forearm (anterior) Posterior & Lateral Leg model & Cat Gluteus maximus Gluteus medius Tensor fasciae latae Iliotibial tract (an aponeurosis) Biceps femoris Semitendinosus Semimembranosus Gastrocnemius Soleus (deep to gastrocnemius) Achilles (calcaneal) tendon Arm & Forearm (posterior) 4 Thigh & Leg (anterior) Anterior & medial Leg model & Cat Rectus femoris Vastus lateralis Vastus intermedius (deep to rectus femoris) Vastus medialis Patellar ligament Sartorius Gracilis Adductor longus Adductor magnus (femoris in cat) Tibialis anterior Thigh & Leg (posterior)
