Infratemporal Fossa The infratemporal fossa lies deep to the ramus of the mandible. It communicates with the temporal fossa superiorly deep to the zygomatic arch; the orbit anteriorly through the inferior orbital fissure; the pterygopalatine fossa medially through the pterygomaxillary…
The mouth extends from the lips and cheeks externally to the anterior pillars of the fauces internally, where it continues into the oropharynx. The mouth can be subdivided into the vestibule external to the teeth and the oral cavity proper…
Skin The scalp and buccolabial tissues are described here. The structure of the eyelids is discussed in Chapter 44 . Scalp The scalp extends from the top of the forehead anteriorly to the superior nuchal line posteriorly. Laterally, it projects…
The neck extends from the base of the cranium and the inferior border of the mandible to the thoracic inlet. Skin The skin in the neck is normally under tension. Lines of greatest tension have been termed ‘relaxed skin tension…
The skull is the bony skeleton of the head. It houses the brain, the organs of special sense, and the upper parts of the respiratory and digestive systems and provides attachments for many of the muscles of the head and…
Skin and Fascia Face and scalp The superficial fascia of the scalp is firm, dense, fibroadipose, and closely adherent to the skin and to the underlying muscle, epicranius and the epicranial aponeurosis. Posteriorly, the fascia is continuous with the superficial…
The comparative anatomy of the long, corticofugal pathways from cortex to subcortical structures is important because we can interpret the key features of these pathways in humans on the basis of their similarities and differences when compared with other animals.…
The cerebral hemispheres are the largest part of the human brain: they consist of the telencephalon (cerebral cortex and underlying white matter), basal ganglia and diencephalon. Both hemispheres are interconnected by the corpus callosum and the anterior commissure. The cerebral…
The term basal ganglia is used to denote a number of subcortical nuclear masses that lie in the inferior part of the cerebral hemisphere, in close relationship with the internal capsule ( Fig. 31.1 ). The traditional definition of the…
The diencephalon is part of the prosencephalon (forebrain), which develops from the most rostral primary cerebral vesicle that differentiates into the caudal diencephalon and the rostral telencephalon. The cerebral hemispheres, containing the lateral ventricles, develop from the telencephalon. The sites…