Exam 2 Part 16 Flashcards
Real-time imaging that uses a camera to scan a horizontal line of vocal fold vibration at a rate of 8000 lines per second
Kymography
What are the advantages of kymography?
Reveals cycle to cycle variability, left or right sided asymmetry, mucosal wave and amplitude, open/close phase timing, phonatory onset and offset movement, upper and lower vocal fold margin changes
What are the disadvantages of kymography?
Limited to spatial and temporal changes of a single horizontal line of bilateral VF movement; Does not allow a complete view of the vocal folds at once
Where is the kymography positioned at?
Mid-membranous vocal fold
What is on the X, Y, Z-axis of the spectrogram?
X (time), Y (fundamental frequency), and Z axis (intensity)
What is one difference between the high speed and kymography?
High speed shows a complete picture of the vocal folds while kymography doesn’t
Shape of the image produced by videokymography.
Diamonds
T/F: Midline juncture is the single horizontal line taken at the center of membranous folds.
True
What gross observations can we make using laryngeal imaging?
static glottic closure, supraglottic hyperfunction, mucus, general appearance and movement
What are some vibratory features we can see using laryngeal imaging?
Vibratory glottic closure, phase closure, symmetry, mucosal wave, stiffness/nonvibrating portion, adynamic segment, periodicity
T/F: Common glottic configuration seen in presbylaryngeus is spindle-shape, whereas, vocal nodules is hour-glass pattern.
True
A non-invasive tool that uses electrical currents that pass through the neck to measure VF contact across time
Electroglottography (EGG)
What does electroglottography (EGG) detect?
Glottal adductory changes
T/F: EGG is an invasive method.
False; non-invasive
During glottal abduction what happens to resistance and current flow if the vocal folds are farther apart?
resistance increases as the vocal folds are farther apart and decrease in current flow is seen.
