Year : 1978 | Volume
: 26 | Issue : 2 | Page : 13--14
Incidence of groove in lateral wall of orbit in Indian skulls
MS Siddiqui, SJ Haider, AC Das
Department of Anatomy, K.G.'s Medical College, Lucknow, India
M S Siddiqui
Department of Anatomy, K.G.«SQ»s Medical College, Lucknow
|How to cite this article:|
Siddiqui M S, Haider S J, Das A C. Incidence of groove in lateral wall of orbit in Indian skulls.Indian J Ophthalmol 1978;26:13-14
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Siddiqui M S, Haider S J, Das A C. Incidence of groove in lateral wall of orbit in Indian skulls. Indian J Ophthalmol [serial online] 1978 [cited 2020 Jul 6 ];26:13-14
Available from: http://www.ijo.in/text.asp?1978/26/2/13/31465
This paper describes the incidence of groove in lateral wall of orbit in Indians. The groove arose either from lateral extremity of the superior orbital fissure or from foramen meningoorbitale. It passed inferiorly down the orbital surface of the greater wing of the sphenoid to terminate at the posterior end of inferior orbital fissure. The groove first was described by Low in single skull. Royelestudied in detail the incidence of groove in 32 skulls, and found the incidence to be 34%. No data was available in Indian skulls. Hence this study was taken up.
Material & Methods
125 dried adult human skulls were examined. They were the collection of the Anatomy Department of K.G.'s Medical College, Lucknow and the majority have been used for undergraduate teaching purposes. The skulls were all probably of Indian origin.
Examination of the orbits of 125 skulls showed that a groove was present in lateral wall [Figure 1] in 47 cases (37.6%). In four of these the groove passed from a foramen meningo orbitale to the posterior end of the inferior orbital fissure [Figure 2] In rest of 43 cases the groove passed from the lateral extremity of the superior orbital fissure to the posterior end of the inferior orbital fissure [Figure 1]. In 27 skulls (21.6%) groove was present only on left side, in two skulls (1.6%) only on right side and 18 skulls (14.4%) it was present on both side. [Table 1]
There is no mention of a groove in the lateral wall of the orbit, either as a normal occurrence or as an anomaly, in the Anatomy text books. Low for the first time described a groove in lateral wall of orbit in a single case. Royele studied in detail the incidence of groove in 32 skulls. The results of the present study and the Royele are compared in [Table 1]. It is apparent that the incidence of the groove is higher in Indian skulls. Bilateral groove is more in other Asian skulls (72.7%) whereas in Indian skulls it is 14.4%. Another important feature noticed was the incidence of the groove is more on left side (21.6%) than on right side (1.6%). There is no mention of difference of such incidence in study of Royele. The groove in only 4 cases extended from foramen meningo orbitale to inferior orbital fissure (two on right side and two left side) 3.2%. There was no case in which two grooves were present one from foramen meningo orbital and other from superior orbital fissure to inferior orbital fissure. The groove probably lodges blood vessels taking part in an anastomosis between the middle meningeal and infra orbital vessels Hayrchs et al.
The present study on 125 skulls (250 orbits) shows that (1) Incidence of grooves is high in Indian skulls (37.6%) in comparison to other Asian skulls (34.4%). The groove is present more frequently on left side (21.6%) than on right side (1.6%). Bilateral presence of groove is less in Indian skulls (14.4%) than in other Asian skulls (72.7%). (2) Extent of groove is same in Indian and Asian skulls. In Asian skulls 2 cases and in Indian skulls 4 cases of groove arising from foramen meningo orbitale to inferior orbital fissure has been reported. (3) No case of two groove one from foramen meningo orbitale and the other from superior orbital fissure to inferior orbital fissure in same orbit is seen in the present study although there is single case report in Asian skulls by Royele. (4) The difference in incidence of the groove may be due to lesser number of skulls (32) studied by Royele" than in present study (125) skulls.
|1||Hayrchss, Dass R , 1962, British J. of Ophthal. 46, 212|
|2||Givin Royele, 1973, Jr. Anat. London, 115, 465. |
|3||Low F.N., 1946, Anat Rec. 95, 347.|