PNB 2274 Lab Practical 2 UPDATED
ACTUAL Exam Questions and CORRECT
Answers
A motor unit includes: - CORRECT ANSWER - A.) Multiple muscle fibers innervated by
multiple motor neuron.
B.) One muscle fiber innervated by multiple motor neuron.
C.) Multiple muscle fibers innervated by one motor neuron.
D.) One muscle fiber innervated by one motor neuron.
Answer: C.)
Skeletal muscles are attached to bones of the skeleton by _________ - CORRECT
ANSWER - Tendons
Each muscle is made up of many individual muscle fibers organized in - CORRECT
ANSWER - Fascicles
What are the two methods of EMG recording? - CORRECT ANSWER - 1. Intramuscular:
insert needle electrodes through the skin into the muscle for an intramuscular EMG
2. Place electrodes on the skin surface for a surface EMG
Motor units fire _________________ - CORRECT ANSWER - asynchronously
EMG is a recording of: - CORRECT ANSWER - A.) The action potential of the motor
nerves supplying the muscle fibers.
B.) The contraction forces of the innervated muscle fibers.
, C.) The action potentials of the innervated muscle fibers.
Answer: C.)
EMG testing is performed with another test, called a nerve conduction study, which yields
information on nerve function. What are the other tests? - CORRECT ANSWER - In
conjunction with EMGs, these tests can help with the diagnosis of nerve compression or injury
(such as carpal tunnel syndrome), nerve root injury (such as sciatica), and other problems of the
muscles or nerves
Signal of interest must ______________________ - CORRECT ANSWER - Go through
amplification, filtering, sampling and display and if instead of being electrical is must be
converted into analog
Digital --> Analog
What is a transducer? - CORRECT ANSWER - Convert analog signal to digital signal
Powerlab hardware is able to: - CORRECT ANSWER - -- Convert analog signal to digital
signal
-- Amplify a signal
-- Filter a signal
Integration ____________ - CORRECT ANSWER - Sums up raw EMG signal
Reciprocal activation: - CORRECT ANSWER - is simultaneous activation of an agonist
muscle and inhibition of an antagonist muscle
Each individual muscle fiber is innervated by a branch of an axon from a _______________ -
CORRECT ANSWER - Motor neuron
ACTUAL Exam Questions and CORRECT
Answers
A motor unit includes: - CORRECT ANSWER - A.) Multiple muscle fibers innervated by
multiple motor neuron.
B.) One muscle fiber innervated by multiple motor neuron.
C.) Multiple muscle fibers innervated by one motor neuron.
D.) One muscle fiber innervated by one motor neuron.
Answer: C.)
Skeletal muscles are attached to bones of the skeleton by _________ - CORRECT
ANSWER - Tendons
Each muscle is made up of many individual muscle fibers organized in - CORRECT
ANSWER - Fascicles
What are the two methods of EMG recording? - CORRECT ANSWER - 1. Intramuscular:
insert needle electrodes through the skin into the muscle for an intramuscular EMG
2. Place electrodes on the skin surface for a surface EMG
Motor units fire _________________ - CORRECT ANSWER - asynchronously
EMG is a recording of: - CORRECT ANSWER - A.) The action potential of the motor
nerves supplying the muscle fibers.
B.) The contraction forces of the innervated muscle fibers.
, C.) The action potentials of the innervated muscle fibers.
Answer: C.)
EMG testing is performed with another test, called a nerve conduction study, which yields
information on nerve function. What are the other tests? - CORRECT ANSWER - In
conjunction with EMGs, these tests can help with the diagnosis of nerve compression or injury
(such as carpal tunnel syndrome), nerve root injury (such as sciatica), and other problems of the
muscles or nerves
Signal of interest must ______________________ - CORRECT ANSWER - Go through
amplification, filtering, sampling and display and if instead of being electrical is must be
converted into analog
Digital --> Analog
What is a transducer? - CORRECT ANSWER - Convert analog signal to digital signal
Powerlab hardware is able to: - CORRECT ANSWER - -- Convert analog signal to digital
signal
-- Amplify a signal
-- Filter a signal
Integration ____________ - CORRECT ANSWER - Sums up raw EMG signal
Reciprocal activation: - CORRECT ANSWER - is simultaneous activation of an agonist
muscle and inhibition of an antagonist muscle
Each individual muscle fiber is innervated by a branch of an axon from a _______________ -
CORRECT ANSWER - Motor neuron
