Copyright Goodheart-Willcox Co., Inc. .
Chapter 3 The Muscular System 77
Test/Procedure Defi nition
deep tendon refl exes
(DTR)
Evaluation of involuntary muscular
responses with a refl ex hammer
(Figure 3.12). Patients under heavy
sedation or in a deep coma do not
exhibit these refl exes.
electromyogram (EMG)
ee-LEK-troh-MIGH-oh-gram
electr/o = electricity
my/o = muscle
-gram = record; image
A graphic recording of the contraction
of a muscle as a result of electrical
stimulation (Figure 3.13 on the next
page).
goniometry
GOH-nee-AH-muh-tree
The measurement of range of motion in
a joint.
magnetic resonance
imaging (MRI)
A noninvasive scanning test that
involves use of an electromagnetic fi eld
and radio waves to visualize soft-tissue
structures.
nuclear medicine imaging
(NMI)
Diagnostic imaging technique in
which a radioactive substance and a
special camera are used to visualize
structures and functions in the body.
The radioactive substance is injected into
or swallowed by the patient.
Puncture
site
Biopsy
needle
Figure 3.11 During a muscle biopsy, a small piece of muscle tissue is removed
for microscopic examination.
Figure 3.12 A neurologist
performs a deep tendon refl ex
(DTR) test on a patient.