304 SPECIAL ANATOMY. 



f. Earn, occipitalis s. parietalis, larger, passes upwards to the vertex and 

 anastomoses with Artt. auricular., occipitalis and ram.frontalis. 



8. Maxillaris internet (s. facialis profunda). Origin : behind the collum 

 condyli of the lower jaw. Course : horizontally forwards, inwards and rather 

 upwards to the tuber, maxill. super., curves forwards and sinks into fossa 

 spheno-maxillaris, where it terminates as spheno-palatina. Position : at first 

 close behind the condylus and before proc. styloideus; between mm. pterygoid. 

 extern, and internus (external to n. dentalis and lingualis), then between 

 pterygoid. extern, and temporalis. 



547. Collateral branches : A. Arising in the neighbourhood 

 of the Collum condyli. 



a. Auricularis profunda ascends directly, divides into branches for the 

 maxillary articulation, the external auditory meatus (through some foramina 

 in the bones) and the inferior border of the memb. tympani. 



b. Tympanica (inferior], the tympanic artery, frequently from Art. tempo- 

 ralis, small ; supplies the external auditory meatus, the maxill. articulation, 

 and enters through fissura Glaseri into the tympanum, on the anterior wall of 

 which and the memb. tympani it anastomoses with tympanica superior (s. 

 stylo-mastoid). 



c. Meningea media s. spinosa, ascends vertically behind collum condyli and 

 m. pterygoid. extern, through foram. spinosum into the cranium, becomes 

 horizontal and is placed, divided into an anterior and posterior branch, be- 

 tween dura mater and the bones of the skull; the anterior ramus ascends from 

 the inferior angle towards the external angle of the fiss. orbital, super., and 

 thence as far upwards as the sagittal suture ; the posterior ramus ascends on 

 the pars mastoid. of the temporal bone as far as the posterior inferior angle of 

 the parietal bone, and as high as the sagittal suture. Small ramuli pass out 

 of the skull. 



1. Ramul. petrosus, through hiatus into canal. Fallopice to the nerv. 

 facialis and Art. stylomastoid. 



2. Eamuli for nerv. trigeminus. 



3. Eamul. for m. mallei intern, through the semi-canal for this. 



4. Rami temporales for the great wing of the sphenoid bone, anastomoses 

 with the Artt. temporales profunda. 



d. Dentalis s. alveolaris inferior, arises close to the last artery, passes down- 

 wards and between m. pterygoid. intern, (or rather lig. maxillare intern.) and 

 the ramus of the lower jaw through foram. maxillar. posteritts, and passes 

 through the canal, alveolar, infer, as it gives off a twig in the interior of this 

 to each tooth, and many small ones for the diploe of each alveolus. Art. my- 

 lohyoidea passes from foram. max. post, to the inner surface of ramus maxillar. 

 in a groove with nerv. mylohyoid downwards to m. mylohyoid. Through/oram. 

 mentale a larger branch passes out as art. mentalis from the canal, and anas- 

 tomoses with art. submentalis and coronar. inferior. 



e. Temporalis prof unda posterior passes between m. pterygoid. extern, and 



