Note how the appendage somites come into being with dermatomes C7-C8 pairs being pushed distally as adjacent pairs. The C6 and T1 pairs follow occupying the next proximal converge of the appendage. Thus, the dermatomes get carried peripherally.

• Note how the appendage somites come into being with dermatomes C7-C8 pairs being pushed distally as adjacent pairs. The C6 and T1 pairs follow occupying the next proximal converge of the appendage. Thus, the dermatomes get carried peripherally.