Fig. 1
From: Effects of early local administration of high-dose bFGF on a recurrent laryngeal nerve injury model
A Endoscopic image at injection. Saline or different doses of basic fibroblast growth factor (bFGF) (200 and 2000 ng: low and high dose, respectively) were injected into the left thyroarytenoid (TA) muscle using laryngeal endoscopy under general anesthesia. B Experimental timeline. The left recurrent laryngeal nerve (RLN) of rats was transected on day-1. Saline or different doses of bFGF were injected into the left TA muscle transorally on day 0. The laryngeal tissues were collected on the indicated days. C, D Representative images of hematoxylin and eosin-stained sections of the larynx 1 day after left RLN transection (C, 40 × magnification; D, 400 × magnification). The solid and dotted rectangles in (C) indicate the TA region of the muscle of the untreated and treated sides, which are shown at a higher magnification in (D)