Figure 9.
Retinal projections with “chains” of terminal-like varicosities in the terminal zone of the superior fasciculus (tzSF) of the mouse accessory optic system. (A,B) Low magnification images showing the superior fasciculus at of two levels of the mouse brain. Image (A) corresponds to Fig. 1mm and image (B) corresponds to Fig. 1M. The circles in (A) and (B) identify the location of the images (A1–A5) and (B1–B4), respectively. (A2) illustrates terminals in the LT of image (A) at the same level as Figs. 1mm and 7B2. (A6) shows the dorsal MT in image (A). In images (A1–5; B1–4), arrowheads point at chains of terminal varicosities. In images (A1, A2, B1), arrows indicate loosely scattered fibers and terminals. The pointers in (A3,A4) are directed at identical locations in the two images, but in one (A3), the external part of the terminal zone is in the focal plane, whereas in the other (A4), the internal part is in focus. (A,B) Bars = 500 μm. (B1) Bar = 20 μm and applies to images (A1–A6; B1–B4).