Note the terminal arbor in the left-hand segment. Here we can see the next layer of muscles below the ones seen in the previous focal plane. Note the positions of FB at the crossing of muscles 3 and 11, and of SB at the proximal edge of muscle 10. Note also the branches at muscles 19 and 4. The m cell provides a reference point to the position of the ventral branches such as the SNb, since the m cell is visible in all of the images of the ventral region. To late 16 ISN To early 17 ISN focal plane 1 To early 17 brightfield To diagram of muscles. To 2nd diagram (muscles and motor axons). Back to table of contents

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