We're unable to sign you in at this time. Please try again in a few minutes.
We were able to sign you in, but your subscription(s) could not be found. Please try again in a few minutes.
There may be a problem with your account. Please contact the AMA Service Center to resolve this issue.
Contact the AMA Service Center:
Telephone: 1 (800) 262-2350 or 1 (312) 670-7827  *   Email: subscriptions@jamanetwork.com
Error Message ......
Article |

Physical Medicine and Rehabilitation

Ernest W. Johnson, MD
JAMA. 1981;245(21):2215-2216. doi:10.1001/jama.1981.03310460067033.
Text Size: A A A
Published online


The United Nations has proclaimed 1981 the International Year of the Disabled, and thus the research and clinical advances in physical medicine and rehabilitation are appropriately highlighted.

Diagnosis  Single-fiber electromyography has emerged as a clinically useful technique to identify neuromuscular transmission defects at an earlier stage in myasthenia gravis and related diseases. It also has become helpful in the semiquantitative estimation of reinnervation after nerve regrowth and certain motor unit diseases. This technique involves the measurement of variations in latencies of transmission of clinically mediated nerve impulses across the myoneural junction within a given motor neuron.Somatosensory potentials recorded over the head and spinal cord have been useful procedures to evaluate afferent pathways in the CNS. These may have prognostic value early in the course of head and spinal cord injuries and are also being used to monitor the spinal cord in certain operations on the spinal column.

Pain Management 


Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?




Also Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
Please click the checkbox indicating that you have read the full article in order to submit your answers.
Your answers have been saved for later.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.


Some tools below are only available to our subscribers or users with an online account.

0 Citations

Sign in

Purchase Options

• Buy this article
• Subscribe to the journal
• Rent this article ?

Related Content

Customize your page view by dragging & repositioning the boxes below.