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Human Anatomy and Physiology Worksheet 8 1. Name: ___________________________________ Identify the following muscles of the head and neck by the following descriptions: ____________________ used in smiling ____________________ used to suck in your cheeks ____________________ used in blinking and squinting ____________________ used to pull the scalp posteriorly ____________________ raises your eyebrows for a questioning expression ____________________ your “kisser” ____________________ prime mover to raise the lower jawbone ____________________ fan-shaped muscle; closes the jaw 2. Identify the major muscles of the trunk by the following descriptions: ____________________ major spine flexor; the name means “straight muscle of the abdomen” ____________________ prime mover for shoulder flexion and adduction ____________________ prime mover for shoulder abduction ____________________ forms the external lateral walls of the abdomen ____________________ acting alone, each muscle of this pair turns the head toward the opposite shoulder ____________________ four muscle pairs that together form the so-called abdominal girdle ____________________ ____________________ ____________________ ____________________ a tendinous “seam”running from the sternum to the pubic symphysis that indicates the midline point of fusion of the abdominal muscle sheaths ____________________ deepest muscle of the abdominal wall ____________________ deep muscles of the thorax that promote the inspiratory phase of breathing ____________________ unpaired muscle that acts in concert with the muscles named immediately above to accomplish inspiration ____________________ muscle that enables you to shrug your shoulders or extend your head ____________________ muscle that pulls the shoulder backward/downward and causes extension of the arm ____________________ shoulder muscle that is the antagonist of muscle just described ____________________ acting individually, small rectangular muscles that rotate the glenoid cavity of the scapulae inferiorly ____________________ rotator cuff muscle that rotates the humerus laterally 3. Identify the major muscles of the upper limbs by the following descriptions: ____________________ wrist flexor that follows the ulna ____________________ muscle that extends the fingers ____________________ elbow flexor that also supinates ____________________ prime mover that extends the elbow/forearm ____________________ stocky muscle, deep to the biceps brachii, prime mover of elbow flexion ____________________ wrist extensors that follow the radius (2) ____________________ ____________________ powerful shoulder abductor; used to raise the arm overhead 4. Identify the major muscles of the lower limbs by the following descriptions: ____________________ strong hip flexor, deep in pelvis; a composite of 2 muscles ____________________ powerful hip extensor; forms most of buttock mass ____________________ inverts and dorsiflexes the foot ____________________ muscle group that enables you to draw your legs to the midline of your body, as when standing at attention ____________________ muscle group that extends the knee ____________________ muscle group that extends the thigh and flexes the knee ____________________ smaller hip muscle commonly used as an injection site ____________________ thin superficial muscle of the medial thigh ____________________ muscle enclosed within fascia that blends into the iliotibial tract; a synergist of the iliopsoas ____________________ dorsiflexes the foot; prime mover of toe extension ____________________ superficial muscle of the lateral leg; plantar flexes and everts the foot 5. When kicking a football, at least three major actions of the lower limb are involved. Name the major muscles or muscle groups responsible for the following: a. flexing the hip joint (2): b. extending the knee: c. dorsiflexing the foot: 6. An accident victim (who was not wearing a seatbelt) was thrown from a vehicle and pronounced dead at the scene. The autopsy reveals the cause of death to be a spinal cord injury resulting in paralysis of the phrenic and intercostals nerves. What muscles were affected and why was this injury fatal? Phrenic nerve Intercostals nerve 7. An elderly man is brought to the clinic by his distraught wife. Among other signs, the nurse notices that the muscles on the right side of his face are slack. What nerve is not functioning properly? 8. Out of control during a temper tantrum, Malcolm smashed his fist through a glass door and severed several tendons at the anterior wrist. What movements are likely to be lost if tendon repair is not possible? Wrist: Finger: 9. Susan, a massage therapist, was giving Mr. Graves a back rub. What two broad superficial muscles of the back were receiving the “bulk” of her attention? 10. Chao-Jung forcefully extended her knee while running for an alley shot on the tennis court and pulled some muscles in her posterior thigh. Precisely what 3 muscles (a-c) were likely strained, and what is the medical name for her condition (d)? a. b. c. d.