Musculus rectus capitis ventralis
A short deep muscle flexing the atlanto-occipital joint (the joint between the skull and C1). Part of the suboccipital group critical for fine head positioning.
Origin: Ventral arch of the atlas (C1)
Insertion: Basilar part of the occipital bone
Action: Flexes the atlanto-occipital joint (nods the head forward)
Innervation: Ventral branch of C1
Dysfunction of the suboccipital muscles contributes to poll stiffness and resistance to bridling.
Dysfunction of the suboccipital muscles contributes to poll stiffness and resistance to bridling. Signs include: Difficulty flexing at the poll; resistance to the bit; head shaking; uneven rein contact; may be associated with TMJ or dental issues.
See the Rectus Capitis Ventralis on our interactive 3D horse model. Open 3D Model