part of has fasciculating neuron projection develops from larval prothoracic posterior intermediate commissure adult posterior intermediate commissure adult prothoracic posterior posterior intermediate commissure 2021-01-11T13:28:01Z VFB:FBbt_00048156 prothoracic pPI ProNm pPI Commissure of the adult prothoracic neuromere that is derived from the larval prothoracic posterior intermediate commissure (Court et al., 2020). It is formed by hemilineage 6B, 12B and 23B neurons, which remain closely-associated in this neuromere and cross the midline as a single commissure (Court et al., 2020). It is found slightly posterior and ventral to the prothoracic anterior posterior intermediate commissure (Court et al., 2020). fly_anatomy.ontology FBbt:00048156 lineage 23 secondary neuron hemilineage 6B secondary neuron hemilineage 12B secondary neuron adult prothoracic neuromere