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The interface
between epidermal and dermal laminas is called the basement membrane
that joins the 2 structures. The coffin bone is attached to the sole by the
periosteum, a vascular connective tissue. The digital extensor tendon
attaches to the top of its dorsal (front) surface and the deep digital
flexor tendon attaches to the top of its plantar/palmar (back) surface
allowing extension or flexion of the hoove.
In addition to attaching the coffin bone to the hoof wall, the laminar
dermal region also contains sensory nerves that inform the horse about the
position of its hoof, is involved in thermoregulation and carries the blood
vessels that nourish the hoof and allow growth.
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