Type 1 thyroplasty is true
Medialisation of vocal cord, used in unilateral complete vocal palsy.
4 types of Thyroplaty.

p - Type 1 - Proximalisation / medialise of VC in u/c complete palsy.
La - Type 2 - Lateralisation of VC.
S - type 3 - shortening of UC / relaxing of UC, used in puberophonia .
Ty - type 4 - Tightening of VC used in androphonia[Female with low pitch voice.
Lateralisation of vocal cord
Medialisation of vocal cord
Vocal cord shortening
Vocal cord Lenhtheninh.