Suboccipital group
Four short paired muscles link the upper two neck vertebrae and the base of the skull.

Attachments & illustration source
Rectus posterior major: C2 to occiput; minor: C1 to occiput; superior oblique: C1 to occiput; inferior oblique: C2 to C1, without a skull attachment.
Original anatomical illustration. Fine attachment boundaries are simplified.
UAMS — Back muscle anatomy tables