Gross Anatomy of the Muscular System

Topics: Flexion, Extension, Shoulder Pages: 12 (1536 words) Published: June 18, 2013
Gross Anatomy of the Muscular System

Laszlo Vass, Ed.D Version 42-0012-01-01

Lab RepoRt assistant

This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

Exercise 1: Muscles of the Head and Neck
obseRvations

| | |Data Table 1: Movement(s) performed by each muscle for Figures 3-4. | |Muscle |Movement(s) Performed | |Example: Deltoid |Example: Abducts the arm | |Frontalis | Raises eyebrows | |Levator Scapulae | Tilts head back | |Masseter | Elevates mandible | |Obicularis oris | Movement of lips | |Occipitalis | Facial movements | |Orbicularis oculi | Close eyelids | |Platysma | Depresses the lower jaw | |Splenius capitis | Head extension/ lateral flexion & rotation of the cervical spine | |Sternocleidomastoid | Flexes the neck/ extends the head | |Supraspinatus | Abduction of the arm at the shoulder joint | |Trapezius | Move the scapulae/ support the arm | |Zygomaticus | Raises the corners of the mouth when a person smiles |

Questions eXeRCise 1

A. List a muscle shown in Figures 3 and 4 that is a prime mover/agonist for pivoting the head. Levator scapulae

B. List one prime mover/agonist for extension of the head. Splenius capitis

C. List one muscle that is the prime mover/agonist for depression of the mandible and list one muscle that is the antagonist for depression of the mandible.
Masseter

D. List one muscle that is a prime mover for smiling.
Zygomaticus

E. List one muscle that raises your eyebrow as if you were questioning what someone said. Fronatlis

Exercise 2: Muscles of the Trunk
obseRvations

| | |Data Table 2: Movement(s) performed by each muscle for Figures 5 through 7....
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