Fig. 5.

DiI/DiO labelling of hypobranchial/hypoglossal muscle precursors (HMP). Dorsal (A, B) or lateral (C–E) views of chicken embryos, rostral to the top. The occipital somites number 2 and 4 (s2, s4), both know to contribute to the hypobranchial/hypoglossal musculature, were labelled with DiI (red) and DiO (green) at HH8+ to HH10, and the position of these cells was recorded at the time points indicated on top of the panel. The labelled cells all collected in a single point at HH17-18 and travelled first ventrolaterally, then rostrally in a single stream. Abbreviations: ma, mandibular arch and ov, otic vesicle.