late 16 SNb, focal plane 3

Here we see two segments. The right-hand one is the same segment viewed in the 2 previous images. Note the positions of the exit junction and of the second junction where SNb and SNd separate. The bundle just to the right of the right-hand SNb is the SNa.

To early 17 SNa focal plane 1

To late 16 SNb focal plane 2

To late 16 brightfield

To diagram of muscles.

To 2nd diagram (muscles and motor axons).

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