Human Anatomy & Physiology                                                                   TESC –

MUSCLE LAB

PURPOSE:  The purpose of this lab exercise is to identify major skeletal muscle groups of the human body.  The lab also enables recognition of antagonistic muscle groups.

OBJECTIVES:   By completing this exercise, students will learn to:

1. Identify major muscle groups on themselves and their lab partner(s)

2. Identify agonist / antagonistic muscle groups

3. Demonstrate specific muscle action

PROCEDURE:  Using the appropriate equipment and a reasonable amount of weight - demonstrate muscle action(s) of indicated muscle groups.  Do 8 - 12 repetitions of each exercise.  Experience the muscle fibers as they fire, recruit and fatigue from the repeated workload.  As you exercise each muscle group - identify

1) bones involved, indicating which bone is the insertion, and which is the origin.  

2)  antagonistic muscle group - group that must relax  so working muscle can contract.

RECORD -  FOR EACH MUSCLE GROUP:

     - muscle action - equipment used / exercise performed.

      -  bones involved - indicating insertion and origin

THIS INFORMATION WILL BE WRITTEN UP AND PUT IN PORTFOLIO

MUSCLE GROUPS FOR LAB      

=  GLUTEAL MUSCLES

           = ABDOMINAL MUSCLES

 = QUADRICEPS MUSCLES

 = HAMSTRING MUSCLES

 = GASTROCNEMIUS / SOLEUS MUSCLES

 = ANTERIOR TIBIALIS / PERONEAL MUSCLES

 = BACK MUSCLES

 = SHOULDER MUSCLES

 = CHEST MUSCLES

 = ARM MUSCLES

Each muscle has 3 main parts: origin, insertion  & belly (body).  The origin is the end attached to the part of the skeleton that does not move when the muscle contracts.  The insertion is the end attached to the part of the skeleton that moves when the muscle contracts.  The belly is the center of the muscle between the origin and the insertion. 

MUSCLE ACTION                             DESCRIPTION

FLEXION          flexor muscles bend a joint or reduces the angle between two bones

EXTENSION          extensor muscles straightens a joint or increases the angle between two bones

ABDUCTION          abductor muscles carry an appendage or part away from midline

          ADDUCTION   adductor muscles brings an appendage or part back to the

                                  midline

ELEVATION    levator muscles raise a part

DEPRESSION   depressor muscles lowers a part

ROTATION      rotator muscles turn one part on another