Pattern of gross displacement of the vocal fold in adduction and abduction movements.
The pattern of gross displacement of the vocal fold during adduction and abduction was studied in 4 adult fresh human larynges (2 males and 2 females). Markers were placed on specific sites along the edge of the vocal fold. Preliminary observations showed upward and lateral movement of the free edge during abduction. The vocal fold as a whole glides into and fills the cavity of the laryngeal ventricle. To quantify this observation 14 larynges (8 males and 6 females) were studied, using a technique designed to measure vertical and horizontal displacement of the vocal fold. An average of a 1.34 mm elevation and 4.43 mm lateral excursion were observed at midvocal fold level. A model for studying the pattern of vocal fold abduction is suggested and discussed.
Kotby
M N
MN
Unit of Phoniatrics Faculty of Medicine, Ain Shams University, Cario, Egypt.
Basiouny
S E
SE
Amin
M
M
Garrett
D
D
Kirchner
J A
JA
Kahane
J C
JC
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction / Q000502:physiology*; D012119:Respiration / Q000502:physiology; D014827:Vocal Cords / Q000502:physiology*