Gross Anatomy of the Muscular System

Topics: Muscles of the upper limb, Flexion, Extension Pages: 13 (1678 words) Published: October 29, 2012
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Gross Anatomy of the Muscular System
Classification of Skeletal Muscles
1. Several criteria were given for the naming of muscles. Match the criteria (column B) to the muscle names (column A). Note that more than one criterion may apply in some cases. Column A g a d f a

Column B a. b. c. d. e. f. g. action of the muscle shape of the muscle location of the origin and/or insertion of the muscle number of origins location of the muscle relative to a bone or body region direction in which the muscle fibers run relative to some imaginary line relative size of the muscle

1. gluteus maximus 2. adductor magnus 3. biceps femoris 4. transversus abdominis 5. extensor carpi ulnaris


6. trapezius

7. rectus femoris

8. external oblique

2. Match the key terms to the muscles and movements described below. Key: a. prime mover (agonist) 1. 2. antagonist prime mover (agonist) antagonist fixator







prime mover (agonist) synergist

term for the biceps brachii during elbow flexion term that describes the relation of brachialis to biceps brachii during elbow flexion term for the triceps brachii during elbow flexion term for the iliopsoas during hip extension term for the gluteus maximus during hip extension when walking up stairs terms for the rotator cuff muscles and deltoid when the elbow is flexed and the hand grabs a tabletop to lift the table

3. 4. 5. 6.


Muscles of the Head and Neck
3. Using choices from the key at the right, correctly identify muscles provided with leader lines on the diagram. Key: a. buccinator b. corrugator supercilii Galea aponeurotica Epicranius (Frontal belly) Corrugator supercilii Orbicularis oculi Levator labii superioris Zygomaticus major and minor Buccinator Masseter Epicranius (occipital belly)

c. depressor anguli oris d. depressor labii inferioris e. epicranius (frontal belly) f. epicranius (occipital belly) g. levator labii superioris h. masseter i. mentalis

Orbicularis oris Mentalis Depressor labii inferioris Depressor anguli oris Platysma Trapezius

j. orbicularis oculi k. orbicularis oris l. platysma m. trapezius n. zygomaticus major and minor

4. Using the key provided in question 3, identify the muscles described next. zygomaticus buccinator

corrugator supercilii

1. 2. 3. 4. 5.

used in smiling used to suck in your cheeks used in blinking and squinting used to pout (pulls the corners of the mouth downward) raises your eyebrows for a questioning expression

orbicularis oris

used to form the vertical frown crease on the forehead your “kisser” prime mover to raise the mandible tenses skin of the neck during shaving

orbicularis oculi masseter Depressor Anguli Oris Muscle and Mentalis Muscle platysma

7. 8. 9.

epicranius (frontal belly)


Review Sheet 15

Muscles of the Trunk
5. Correctly identify both intact and transected (cut) muscles depicted in the diagram, using the key given at the right. (Not all terms will be used in this identification.) Key: Coracoid process Bursa Clavicle Sternum

a. biceps brachii b. brachialis c. deltoid (cut)


d. external intercostals

e. external oblique
Pectoralis minor

f. internal oblique g. latissimus dorsi

Serratus anterior

h. pectoralis major (cut) i. pectoralis minor

Biceps brachiEx

j. rectus abdominis
External oblique

k. rhomboids l. serratus anterior

m. subscapularis n. transversus abdominis o. trapezius

6. Using the key provided in question 5 above, identify the major muscles described next. rectus abdominus latissimus dorsi latissimus dorsi, pectoralis major

1. 2. 3. 4.

a major spine flexor prime mover for arm extension prime mover for arm flexion

pectoralis major

serratus anterior

6. important in shoulder...
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