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10 Transfrontal Craniotomy

Ane Uriarte and Rodolfo Cappello

Introduction by maxillary blood [2]. The frontal bone, frontal sinus, and
The rostral cerebrum comprises the brain tissue rostral to the cribriform plate protect the frontal lobe of the cerebrum
cruciate sulcus and pyriform lobe. The blood supply is main­ (Figures 10.2 and 10.3). The size and shape of the frontal sinus
tained by the rostral and middle cerebral arteries (Figure 10.1) varies with the breed and skull type. In general, brachycephalic
[1]. In dogs, the blood reaching the rostral half of the brain is breeds have a smaller or absent frontal sinus compared with mes­
from the internal carotid. In cats, the entire adult brain is supplied ocephalic dogs, while dolichocephalic breeds have a larger and
longer frontal sinus (Figure 10.4).
The history of the study of frontal lobe function is one of the
most complicated and contradictory chapters in the investigation of
brain physiology [3]. Multiple studies were performed in the past
Rostral cerebral
artery on lobotomized dogs [4,5]. Pavlov regarded the frontal lobes in
dogs as an essential and the most complex component of the motor
cortex, participating in the selection of necessary “goal‐directed
movements.” It seems the frontal lobes determine the adaptive
capacities of dogs with regard to their repeated patterns and their
capacity for rapid and appropriate change of task [6]. More recent
studies performed in a canine model of aging (the frontal lobe
Middle cerebral
artery seems sensitive to normal aging) have shown that reduced frontal
lobe volume correlates with impaired performance on measures of
executive function, including inhibitory control and complex work­
Figure 10.1 Blood supply of the frontal lobe. ing memory [7].

Parietal bone Frontal bone

Frontal sinus

Cribriform plate
Brain

Maxilla
Temporal bone
Figure 10.2 Schematic drawing of the major Occipital bone
structures surrounding the frontal lobe.

Current Techniques in Canine and Feline Neurosurgery, First Edition. Edited by Andy Shores and Brigitte A. Brisson.
© 2017 John Wiley & Sons, Inc. Published 2017 by John Wiley & Sons, Inc.
Companion website: www.wiley.com/go/shores/neurosurgery

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