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Week 4 Assignment: Muscles of the Head, Neck, and Trunk
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1. Give an example and draw the muscle fiber directions for the following muscle types:
a. Parallel
b. Convergent
c. Unipennate
d. Bipennate
e. Multipennate
f. Circular
2. Identify one synergistic muscle of the following structures. If there are multiple actions for
any of the following muscles, specify the synergistic action for the muscle:
a. Digastric M
b. Sternocleidomastoid M
c. Splenius capitis M
d. Trapezius M
e. Latissimus dorsi M
f. Spinalis M
g. Semispinalis M
h. Serratus posterior superior M
i. Psoas major M
j. Lateral pterygoid M
3. Identify one antagonistic muscle of the following structures. If there are multiple actions for
any of the following muscles, specify the antagonistic action for the muscle:
a. Levator scapulae M
b. External intercostal M
c. Quadratus lumborum M
d. Pectoralis major M
e. Serratus anterior M
f. Deltoid M
g. Genioglossus M
h. Scalene M
4. Identify all the muscles innervated by each of the following nerves:
a. Cervical spinal N
b. Hypoglossal N
c. Glossopharyngeal N
d. Facial N
e. Oculomotor N
f. Intercostal N
5. Draw the suboccipital triangle from the posterior perspective and label the muscles, origins,
and insertions.
6. Draw the anterior neck from the anterior perspective and label the muscles, origins, and
insertions.
7. Draw the erector spinae group from the posterior perspective and label the muscles, origins,
and insertions.
8. Draw the transversospinalis group from the posterior perspective and label the muscles,
origins, and insertions.
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