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Figure 9.9 (continuedKey Concept:Why is the rectus femoris the only muscle of the quadriceps femoris group to have an action on the hip joint? ) Identify It: Muscles of the Leg and Foot
Identify and color-code each muscle illustrated in Figure 9.10. Then, write the muscle’s main action(s) under its name.
170Active-Learning Workbook Figure 9.10 Muscles of the leg and foot.
Chapter 9The Muscular System171Figure 9.10
(continuedModule 9.6: Putting It All Together: The Big Picture of Muscle Movement Now we put all the muscles we have learned about together in order to form a big picture of all the muscles involved in performing common movements. At the end of this module, you should be able to do the following: 1. Identify the locations of the major skeletal muscles, and demonstrate their actions. Identify It: Muscles of the Whole Body Identify and color-code each muscle illustrated in Figure 9.11. Note that these diagrams show only the superficial muscles—most deep muscles are not visible. )
172Active-Learning Workbook Figure 9.11 Muscles of the whole body. SGExTFiVVaRGASPLlTeFlPFBPBBTrDMTeExTInRIPePPStSternohyoidOZOE
174Active-Learning Workbook Practice It: Muscle Movements List the muscles involved in performing each of the following movements, and describe the actions each muscle is
undergoing during the movement. 1.Lifting a coffee cup to your mouth.Biceps2.Doing a sit-up. The rectus abdominis and also work the external and internal obliques.3.Squatting down to the ground and returning to a standing position. The hips and knees undergo extension while the ankle plantarflexes.Build Your Own Summary Table: Motions That Occur at Synovial Joints Build your own table of the main muscles that move the major synovial joints by filling in the table below. This table is far from complete, as there are so many muscles in the body. For this reason, some blank cells have been added to the end if you want to list other joints and motions. Summary of Main Muscles That Act on Joints Joint/Motion Muscles Responsible for the Action Head/NeckFlexion An angular movement whereby the angle decreases between articulating bones, bringing the bones closer together.Extension An angular movement whereby the angle increases between articulating bones, moving the bones away from each other.Lateral flexion Passive bending movement of a body part in the lateral direction.Rotation Movement in which something bone or whole limb, pivots orresolves around a single long axis.
Chapter 9The Muscular System175ShoulderIs one of the largest & most complex joints in the body.Flexion The action of bending or the condition of being bent, especially the bending of a limb or joint.Joint/MotionMuscles Responsible for the Action Extension Is the opposite of flexion.