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Oct 30, 2023 · Fossa and fovea A fossa is a depression in the bone surface which is often broad and shallow. It may support brain structures, or receive another articulating bone. The temporal fossa is one example. It is one of the largest landmarks on the skull, serving as an origin site for the temporal muscle.
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The floor of the cranial cavity is divided into three distinct depressions. They are known as the anterior cranial fossa, middle cranial fossa and posterior cranial fossa. Each fossa accommodates a different part of the brain. The middle cranial fossa is located, as its name suggests, centrally in the cranial floor.
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- Muscles
- Nerves
- Vasculature
The infratemporal fossa is associated with the muscles of mastication. The medial and lateral pterygoidsare located within the fossa itself, whilst the masseter and temporalis muscles insert and originate into the borders of the fossa.
The infratemporal fossa forms an important passage for a number of nerves originating in the cranial cavity (figure 1.2): 1. Mandibular nerve– a branch of the trigeminal nerve (CN V). It enters the fossa via the foramen ovale, giving rise to motor and sensory branches. The sensory branches continue inferiorly to provide innervation to some of the c...
The infratemporal fossa contains several vascular structures: 1. Maxillary artery – the terminal branch of the external carotid artery. It travels through the infratemporal fossa. 1.1. Within the fossa, it gives rise to the middle meningeal artery, which passes through the superior border via the foramen spinosum. 2. Pterygoid venous plexus – drain...
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Each fossa accommodates a different part of the brain. The posterior cranial fossa is the most posterior and deep of the three cranial fossae. It accommodates the brainstem and cerebellum. In this article, we shall look at the borders, contents and clinical correlations of the posterior cranial fossa.
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Jul 28, 2024 · A fossa is a depression or hollow area in a bone. Fossae (plural) can vary in size and shape, and they serve various functions, such as providing space for muscle attachment, housing structures like nerves and blood vessels, or forming part of a joint.
Oct 30, 2023 · Key facts about the infratemporal fossa; Definition: The infratemporal fossa is an irregular space at the lateral aspect of the skull, situated inferior to the temporal fossa and deep to the ramus of the mandible. Borders: Anterior wall: Posterior and infratemporal surface of the maxilla
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What is a fossa in anatomy?
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What is the infratemporal fossa?
In anatomy, a fossa (/ ˈ f ɒ s ə /; [1] [2] pl.: fossae (/ ˈ f ɒ s iː / or / ˈ f ɒ s aɪ /); from Latin 'ditch, trench') is a depression or hollow, usually in a bone, such as the hypophyseal fossa (the depression in the sphenoid bone). [3] Some examples include: In the skull: Cranial fossa. Anterior cranial fossa; Middle cranial fossa ...
