Comparative studies on the brainstem of some domestic animals I medulla oblongata and pons. [electronic resource] :
دراسات مقارنة لساق الدماغ لبعض الحيوانات المستأنسة : 1-الجسر والنخاع المستطيل.
- p.1-21.
Includes references.
In this work the main anatomical differences of the myelencephalon (Medulla oblongata) and metencephalon (pons) as parts of the brainstem of the donkey, sheep, pig, dog and cat were studied. Apparently the brain as a whole is rounded in cat, cone shape in dog, ovoid in donkey, ovoid with truncated rostral end in sheep and ovoid but little bit wide caudally in pig. The brainstem of pig appears to lie in two different levels. The longest brainstem was observed in dog ( 65% ), while the shortest one was in pig (46.3%). The heaviest brainstem was recorded in pig (21.2%)and the lightest ones was in donkey (10.7%). The length of the medulla oblongata and pons to the total length of the brainstem recorded its highest value in pig (78.4% )and its lowest value in sheep (53 .3% ). The heaviest medulla and pons were observed in donkey (52.8%) while the lightest ones were in pig (17.9%). The longest pons to the total length of the brainstem was observed in cat (28.1%) while the shortest one was observed in sheep (16.7%). The medulla oblongata is quadrilateral in shape, broader rostrally and narrow caudally.