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BLOOD-VESSEL SYSTE3I OF THE HEAD, ETC. 231

(occasionally it passes on the inner side), nntil opposite the space
between the two heads of this nuiscle. Here it tnrns inward between
these heads into the spheno-maxillarv fossa, where it terminates in
various branches having close relation with the spheno-palatine
(Meckel's) ganglion.
For facility of studying, the branches of this artery are arranged
Fig. 109.

IPfffi/^c •Palatini
Plan of the Branches
DesceneUntf Pafafr'nt
Falartna
Dee/i TfTnfi.
MlJdfe MtntTtgeal
Mmf-ng Tvmfic
Irjiricr Denial-

The Internal Maxillary Artery and its Branches.
under three heads, according to their anatomical relation to the parts
which they supply
Tlie First or 3IaxiUary Division extends from the external carotid to
the internal lateral ligament, and gives off five branches, which pass
into or through osseous foramina. These branches are the deep auric-
ular, tympanic, middle (or great meningeal), small meningeal, and the
inferior dental.
The Second or Pteryrfoicl Division extends fi'om the internal lateral
ligament to the point at which the artery passes through the space