Logo
Home Study Material Contact Search
AI Chat FREE
  1. sciences
  2. medical sciences
  3. describe the signal averaging technique for measur

Describe the signal averaging technique for measuring weak evoked electrical responses from the brain with scalp electrodes

60.1K

Verified Solution

Question

Medical Sciences

Describe the signal averaging technique for measuring weakevoked
electrical responses from the brain with scalp electrodes

Answer & Explanation Solved by verified expert
3.7 Ratings (562 Votes)
An evoked potential or evoked response is an electrical potential in a specific pattern recorded from a specific part of the nervous system especially the brain of a human or other animals following presentation of a stimulus such as a light flash or a pure tone Different types of potentials result from stimuli of different modalities and types EP is distinct from spontaneous potentials as detected by electroencephalography EEG electromyography EMG or other electrophysiologic recording method Such potentials are useful for electrodiagnosis and monitoring that include detections of disease and drugrelated sensory dysfunction and intraoperative monitoring of sensory pathway integrity Evoked potential amplitudes tend to be low ranging from less than a microvolt to several microvolts compared to tens of microvolts for EEG millivolts for EMG and often close to 20 millivolts for ECG To resolve these lowamplitude potentials against the background of ongoing EEG ECG EMG and other biological signals and ambient noise signal averaging is usually required The signal is timelocked to the stimulus and most of the noise occurs randomly allowing the noise to be averaged out with averaging of repeated responses Signals can be recorded from cerebral cortex brain stem spinal cord and peripheral nerves Usually the term evoked potential is reserved for responses involving either recording from or stimulation of central nervous system structures Thus evoked compound motor action potentials CMAP or sensory nerve action potentials SNAP as used in nerve conduction studies NCS are generally not thought of as evoked potentials though they do meet the above definition Evoked potential is different from eventrelated potential ERP although the terms are sometimes used synonymously because ERP has higher latency and is associated with higher cognitive processing Sensory evoked potentialsEdit Sensory evoked potentials SEP are recorded from the central nervous system following stimulation of sense organs for example visual evoked potentials elicited by a flashing light or changing pattern on a monitorauditory evoked potentials by a click or tone stimulus presented through earphones or tactile or somatosensory evoked potential SSEP elicited by tactile or electrical stimulation of a sensory or mixed nerve in the periphery Sensory evoked potentials have been widely used in clinical diagnostic medicine since the 1970s and    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Zin AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Q

Which expression is equivalent to 52 2 3 2x 3 C 4 13 4 2...

Basic Math
Q

In addition to state-of-the-art technologies, the production of quality wine is strongly influenced by the natural...

Statistics
Q

Hint Questions 4 and 5 You don t have to do the z score transformation...

Statistics
Q

2 For each of the functions below use your graphing calculator to draw a graph...

Calculus
Q

LEARN IT Choosing a Solution Method We ve now discussed three different methods for solving...

Algebra
Q

Applying the Cost of Goods Sold Model The following amounts were obtained from Stanwick Company's...

Accounting
Q

Required: Based on the following information: Prepare the closing entries for June for Betty Barnes...

Accounting
Q

15. When a company maintains its own records of stock transactions and capital stock outstanding,...

Accounting
Q

Barber and Atkins are partners in an accounting firm and share net income and loss...

Accounting
Q

The following budgeted information is for X Company's two products, A and B, for 2022:...

Accounting
Q

Crawford Corporation incurred the following transactions. 1. Purchased raw materials on account $53,000. 2. Raw...

Accounting
Q

1. What state tax issues should a consultant be concerned with for a purchasing company...

Accounting