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- Learn how to classify muscle levers and explain how levers affect muscle efficiency.
- Describe how articulation is caused by muscular contraction.
- Discuss how muscular contraction determines muscle origin and insertion.
- Explain how the muscles of the head and neck support and move the head and face.
- Describe how axial muscles and the muscles of the vertebral column move and support the trunk.
- Learn how the shoulder muscles move and support the arms.
- Understand how the arm muscles move and support the forearms.
- Discuss how the forearm muscles provide movement and support to the hands.
- Explain how the hip muscles move and support the thighs.
- Describe how the thigh muscles provide movement and support to the legs.
- Understand how the leg muscles provide movement and support to the feet.
1. How Muscle Levers Affect Muscle Efficiency
Muscular contraction creates force to move the weight of our body and body parts. This lesson describes the three lever systems utilized by our body to create movement. The efficiency of each lever type in terms of strength, speed and distance are identified along with examples.
2. How Muscular Contraction Causes Articulation: Definition & Types
Skeletal muscle contraction causes all types of movement. Movement at our joints is referred to as articulation. All articulation is described in reference to the anatomical position, and most articulations are identified in opposite pairs. This lesson identifies and describes the major articulations of the human body.
3. Muscle Origin and Insertion: Definition and Actions
Did you know that groups of muscles are needed for various body movements? Skeletal muscles attached to bone are responsible for movement and support. Muscles work in groups to produce a particular movement. This lesson describes how muscle origins and insertions dictate the type of movement that occurs when a muscle contracts.
4. Muscles of the Head and Neck: Anatomy, Motion & Support
The muscles of the head and neck are responsible for a variety of movements, including facial expression, mastication, and eye movement, in addition to moving the head. This lesson identifies and describes the major muscles of the head and neck along with their general action.
5. Muscles of the Vertebral Column: Support & Movement
Did you know that lower back pain can be caused by injury to muscles attached to the vertebral column? This lesson identifies and describes the major erector spinae muscles responsible for erect posture and movement.
6. Axial Muscles: Trunk Muscles Anatomy & Support
The trunk, or torso, of the human body contains several important muscle groups that aid in breathing and provide support to other parts of our anatomy. This lesson explores the location and function of the major axial muscles.
7. Shoulder Muscles: Anatomy, Support & Movement
The shoulder contains muscles that not only stabilize the shoulder but also move the arm. This lesson identifies and describes the muscles responsible for shoulder positioning, adduction, abduction, flexion, extension and shoulder rotation.
8. Arm Muscles: Anatomy, Support & Movement
Did you know that push-ups require contraction of the triceps brachii? The muscles that move the forearm can be categorized based on general action. This lesson identifies the major forearm flexors, extensors, supinators and pronators.
9. Forearm Muscles: Anatomy, Support & Movement
Did you know the muscles that move the hand, fingers and thumb are located in the forearm? This lesson identifies and describes the major muscles that flex and extend the wrist, fingers and thumb.
10. Hip Muscles: Anatomy, Support & Movement
Did you know the gluteal muscles of the buttocks are among the strongest in the body? These muscles, along with other muscles, originate from the pelvic girdle and insert on the femur, producing movement of the thigh.
11. Thigh Muscles: Anatomy, Support & Movement
Did you know the thigh is the part of the lower appendage proximal to the knee? The muscles of the thigh move the leg at the knee. This lesson will identify the major muscles involved in flexion and extension of the leg at the knee, including the hamstrings and quadriceps femoris groups.
12. Leg Muscles: Anatomy, Support & Movement
The larger muscles that move the foot and toes are located in the leg, while smaller muscles are located in the foot. This lesson describes the major muscles responsible for the various movements of the foot at the ankle and the toes.
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