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Latest News and
Information From Medical e-Journals
Neuroanatomy
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Neuroanatomy.
Neuroanatomy
An annual journal of clinical neuroanatomy and
neuroscience
A cause of entrapment of the lingual nerve: ossified pterygospinous ligament ...
24 Nov 2009 at 3:30am
Erdogmus S, Pinar Y, Celik S.
The ossification of pterygospinous ligament forms the pterygospinous bony bridge and pterygospinous foramen.
In existence of bony bridge, some branches of the mandibular nerve may run through the pterygospinous
foramen. In this case, the entrapment of the nerve may occur. During routine dissection of a male cadaver
that had been fixed with 10% formaldehyde solution, unusual course of the lingual nerve was encountered.
The pterygospinous bony bridge passed among the fibers of the lingual nerve and it divided it into two parts
as anterior and posterior. The anterior fibers lied between tensor veli palatini and medial pterygoid muscles,
and the bony bridge, vulnerable to the risk of compression. The ossified pterygospinous ligament may cause
mandibular neuralgia. Besides, it can act as an obstacle for the mandibular nerve block.
© NEUROANATOMY 2009; 8: 43-5.
Surgical anatomy of petrous part of the internal carotid artery
24 Nov 2009 at 3:30am
Keshelava G, Mikadze I, Abzianidze G, Kikalishvili L, Kakabadze Z.
The purpose of this study was to reveal the anatomical relationships of petrous part of the internal carotid
artery. Sixteen human cadavers were investigated via preauricular surgical approach (bilateral exposure on
each cadaver). A 6 cm long incision was made in front of the auricle, along the posterior border of the ramus
of mandible, as higher as the level of the temporomandibular joint. After luxation of temporo-mandibular
articulation and milling of tympanic bone, vertical and horizontal segments of petrous part of the internal
carotid artery were exposed.
The vertical segment?s mean length was 12 mm (ranged 10 mm to 15 mm). The relationships of the vertical
segment were the jugular fossa posteriorly, tympanic bone laterally, and Eustachian tube anteriorly. Horizontal
segment?s mean length was 20 mm (ranged 18 mm to 22 mm). Angle between vertical and horizontal segments
of the petrous part of the internal carotid artery was measured 105° (ranged 95 to 110°).
V, VII, IX, X, XII cranial nerves, internal jugular vein, and Eustachian tube are important structures, which
must be protected during high carotid surgery.
© NEUROANATOMY 2009; 8: 46-8.
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