H&N.7 (Digastric muscle)

H&N.7 (Digastric muscle)


So, this is the intermediate tendon of digastric,
this is the posterior belly of digastric and this is the anterior belly of digastric, which
is attached to the mandible. The anterior belly is attached to the mandible and therefore
it is supplied by the mandibular nerve. The, posterior belly is supplied by the facial
nerve. This muscle when it contracts, then it helps to open a closed mouth, that it takes
the mandible down. And, of course if this the lower border of the mandible, the mandible
is cut here “the body of mandible”, but if this is the lower border of the mandible,
this is the “anterior belly of digastris, and this is the posterior belly of digastric”,
then, this will be the submandibular triangle of the neck bounded above by the mandible
and below by the digastric. It’s called the submandibular triangle or the digastric triangle
because it contains the submandibular gland. Again, if I come here, this is the mandible,
this is the submandibular gland, and of course the digastric muscle is removed , but if we
imagined that the digastric muscle is here, “anterior belly, posterior belly and mandible”,
then this is the submandibular triangle containing the submandibular gland. So, we have the lower
border of the mandible, we have the anterior belly of digastric attached to the digastric
fossa of the mandible and of course posteriorly, is the posterior belly of digastric and the
intermediate tendon. This, triangle bounded above by the mandible and below by the digastric,
is the digastric triangle or the submandibular triangle, as it contains the submandibular
gland or the salivary gland.

One Reply to “H&N.7 (Digastric muscle)”

Leave a Reply

Your email address will not be published. Required fields are marked *