early 17 SNb, focal plane 2

In this focal plane we now see the 4 muscles 12,13, 6, and 7 in focus. The 6/7 synapse is also in focus, but the segment of the SNb on the interior face of 13 is just out of focus. The ISN is now also visible distal to the VLMs but not within the VLM field, because it turns interiorly after passing the VLMs. SNc and d are also now visible.

To early 17 SNb focal plane 3

To early 17 SNb focal plane 1

To early 17 brightfield

To diagram of muscles.

To 2nd diagram (muscles and motor axons).

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