Motor axons expressing EphBs:
A) innervate muscles in the dorsal part of the limb.
B) are attracted to ephrin-A.
C) are located more medially in the spinal cord.
D) also express the transcription factor Lim1.
E) All of the above

Question

Quizplus · Accepted Answer

Medial spinal cord neurons express Isl1, which promotes EphBexpression. This results in repulsion by the ephrin-Bin the dorsal part of the limb field and thus innervation of ventral limb muscles.

Motor Axons Expressing EphBs