Term
|
Definition
|
|
Term
| what is half wave rectificatoin |
|
Definition
| cut off the negative half of the SEMG wave |
|
|
Term
| what is full wave rectification |
|
Definition
| add absolute values of negative and positive to get higher waves on top |
|
|
Term
|
Definition
| draw a line across the peaks |
|
|
Term
|
Definition
| rectified signal activity collected over a period of time and given as a total or average |
|
|
Term
| why is the integrated value useful |
|
Definition
| can compare over different treatment periods to see if change is occurring |
|
|
Term
|
Definition
| allows you to change the sensitivity of the device so that you can see the signal |
|
|
Term
| How is the signal detected |
|
Definition
| there are 2 active electrodes plus a reference electrode. The electric activity coming off the muscle is detected by the active electrodes, and noise/ambient signals are subtracted. |
|
|
Term
| how does SEMG enhance healing from peripheral nerve injury |
|
Definition
| detects information coming out of the nerve. Use that information to encourage to work harder. |
|
|
Term
| what other things does SEMG enhance (other than healing from peripheral nerve injury) |
|
Definition
| muscle weakness, antagonists to spastic muscles, muscle transfer |
|
|
Term
| what is muscle transfer and how does SEMG help it |
|
Definition
| if you lose the muscles of hand in one area, surgery is used to change position of tendon and turn muscle from extensor to flexor, etc. Use EMG to train person to flex instead of extend. |
|
|
Term
| what 3 things does SEMG help to reduce |
|
Definition
| pain, spasticity, stress related activity |
|
|
Term
| what 4 things must be present in a patient for successful SEMG |
|
Definition
| vision, cognition, hearing, expression |
|
|
Term
|
Definition
| patient's interaction with it |
|
|
Term
| what to consider in evaluation for SEMG |
|
Definition
| define the exact goal the BFB will accomplish and relate to functional activities |
|
|
Term
| what skin factors must you consider before using SEMG |
|
Definition
| oil, dirt, hair, keratinization |
|
|
Term
| what do you have to do to prepare skin for SEMG |
|
Definition
|
|
Term
| what are skin prep techniques for SEMG? |
|
Definition
| alcohol rub, abrasive electrolytic paste, shaving, sand paper, skin drill |
|
|
Term
| what is the goal in determining appropriate electrode size for SEMG |
|
Definition
| gain a reasonable sample of the muscle's electrical activity |
|
|
Term
| what is the range of electrode sizes for SEMG |
|
Definition
|
|
Term
| what to consider in placement of electrode for SEMG |
|
Definition
| where muscle will be at beginning and end of movement; skin electrode will stay on the skin but not necessarily on the muscle |
|
|
Term
| what types of electrodes are used in SEMG |
|
Definition
| needle/wire, surface disc, silver-silver chloride |
|
|
Term
| do larger electrodes provide an increased signal amplitude? |
|
Definition
|
|
Term
| are fine wire electrodes surface electrodes |
|
Definition
|
|
Term
| what does increasing size of electrode do for you in SEMG? |
|
Definition
| gather more information: how discrete to a point or non-discrete you're going to be |
|
|
Term
| do you hear signals better from signals close to electrode or signals far from electrode |
|
Definition
|
|
Term
| what should you do if you're recording at the same place several weeks in a row? |
|
Definition
| use discrete measurements or silver nitrate to be sure to always use same spot |
|
|
Term
| what part of the muscle should you place the electrode on? |
|
Definition
|
|
Term
| how to orient electrodes for weak muscle or to get the best recording |
|
Definition
| parallel down the length of the muscle |
|
|
Term
| when is it ok to orient electrodes perpendicular to the length of the muscle |
|
Definition
|
|
Term
| at what distance can you expect to pick up signals |
|
Definition
| distance equal to that of inter-electrode spacing |
|
|
Term
| what does increasing the space between the electrodes increase the chance of |
|
Definition
| volume conduction: extra noise coming in from muscles you're not testing |
|
|
Term
| how to get more specific recording |
|
Definition
| use smaller electrodes closer together |
|
|
Term
|
Definition
| how easily the device can display the activity. |
|
|
Term
| how are sensitivity of the device and gain related |
|
Definition
| the more sensitive the device, the greater the gain |
|
|
Term
| if you're getting a very tiny signal, what can you do to amplify it |
|
Definition
|
|
Term
| what is the time constant |
|
Definition
| the integrator: takes the raw, amplified data and reads it out to you in numbers so that you can react |
|
|
Term
| what are short time constants good for |
|
Definition
| dynamic activity that requires short adjustment time |
|
|
Term
| what are long time constants good for |
|
Definition
| postural activity, activities that need time to adjust for |
|
|
Term
| what is an example of a short time constant |
|
Definition
|
|
Term
| what is a long time constant |
|
Definition
|
|
Term
| is a change in EMG equivalent to a change in function? |
|
Definition
|
|
Term
| does increasing EMG mean increased ROM |
|
Definition
|
|
Term
| does increased EMG mean increased strength? |
|
Definition
|
|
Term
| what does the EMG tell you? |
|
Definition
| that the muscle is active and it's putting out a certain, measurable amount of activity |
|
|
Term
| what should you do to get functional information with EMG? |
|
Definition
| do EMG with another parameter, such as EMG and actual force output |
|
|
Term
| how much EMG can be used as treatment |
|
Definition
| depends on fatigueability and condition of the patient |
|
|
Term
| how many treatment sessions for CVA? |
|
Definition
| anywhere from a few to 30 |
|
|
Term
| can SEMG be used as treatment at home? |
|
Definition
|
|
Term
| what makes sending SEMG home with someone difficult |
|
Definition
| they must be able to understand it and must be well trained and compliant |
|
|
Term
| how to measure outcomes of SEMG treatment |
|
Definition
| change in integrated output for a given time period, length of time EMG activity is sustained at/above threshold, time required to reach threshold |
|
|
Term
| can you compare SEMG for separate muscles? Why or why not? |
|
Definition
| no, because you can be sure you have the electrodes at exactly the right spot for comparison. You also have different skin resistances, muscle depth, muscle size, fat content |
|
|
Term
|
Definition
| trying to equalize factors to determine a baseline for a particular muscle and have a set up that can be repeated |
|
|
Term
| • Apply and develop EMG protocols for enhancing skeletal muscle contraction. |
|
Definition
| right now, you can get to 25mv. I want you to get to 35 mV. I will set threshold at a certain height and see how long you can hold it there |
|
|
