---
title: "Temporal Fossa | Anatomy and Physiology I"
description: "Temporal fossa is the shallow depression on the side of the skull where the temporalis muscle attaches, supporting jaw elevation in Anatomy and Physiology I."
canonical: "https://fiveable.me/anatomy-physiology/key-terms/temporal-fossa"
type: "key-term"
subject: "Anatomy and Physiology I"
unit: "Unit 7"
---

# Temporal Fossa | Anatomy and Physiology I

## Definition

The temporal fossa is a shallow depression on the side of the skull that gives the temporalis muscle space to attach. In Anatomy and Physiology I, it shows how skull shape supports chewing.

## What It Is

The temporal fossa is a shallow, broad depression on the lateral side of the skull. In Anatomy and Physiology I, you usually see it described as the area above the zygomatic arch and below the temporal line, where the temporalis muscle attaches.

This is not just a random dip in the bone. The skull has contours that match the muscles sitting on top of it, and the temporal fossa is one of the best examples of that relationship. The temporalis muscle fills this space and uses it as a site for attachment through its tendon and fascia.

If you trace it on a skull model, the temporal fossa is part of the temporal region and sits on the temporal, parietal, frontal, and sphenoid bones depending on the exact boundary you are identifying. The exact edges can feel tricky at first because different bones contribute to the same surface area, but the main idea stays the same: this is the bony space that accommodates the temporalis.

Functionally, the temporal fossa matters because the temporalis is a strong muscle of mastication. When it contracts, it helps elevate the mandible, which is the movement that closes your jaw. It also helps retract the jaw after it moves forward. So the fossa is tied directly to chewing mechanics, even though the fossa itself does not move.

A common point of confusion is that the temporal fossa is not the same thing as the temporal line. The temporal line is a ridge that marks the upper boundary where fascia attaches, while the fossa is the depressed area beneath it. On a bone diagram, the line may look like a border and the fossa like the working space underneath that border.

If you are looking at a skull image in lab, the easiest way to spot the temporal fossa is to find the zygomatic arch first, then look just above it on the side of the cranium. That space is where the temporalis sits, so the fossa is part of the skeletal setup for jaw motion rather than a joint or an opening.

## Why It Matters

The temporal fossa shows how the skull is built for function, not just protection. In Anatomy and Physiology I, that idea comes up again and again when you connect bone landmarks to muscles, movement, and surface anatomy.

It also gives you a concrete way to study the muscles of mastication. If you know where the temporalis attaches, it becomes easier to explain why the jaw elevates so powerfully and why the muscle has such a broad attachment area on the side of the skull. That makes the temporal fossa useful when you are comparing skull landmarks, labeling diagrams, or matching muscle names to their origins and insertions.

This term also helps you avoid mixing up nearby structures. The temporal fossa sits near the zygomatic arch, temporal line, coronoid process of the mandible, and other skull landmarks that often show up together on lab exams. Once you can place the fossa correctly, the rest of that region is easier to organize in your head.

It is a good example of the course pattern that bones are not just rigid supports. Their shapes create attachment sites, passageways, and protective spaces that make movement and body function possible.

## Connections

### Temporalis Muscle

The temporalis is the muscle that occupies the temporal fossa and attaches there through a broad origin. When it contracts, it elevates the mandible and helps close the jaw. If you know the muscle, the fossa makes more sense as its bony housing and attachment surface.

### [Zygomatic Arch](/anatomy-physiology/key-terms/zygomatic-arch)

The zygomatic arch forms the lower boundary of the temporal fossa in a typical skull view. It is a useful landmark when you are trying to locate the fossa on a bone model or image. It also sits close to the path of the temporalis muscle as it travels toward the mandible.

### Temporal Line

The temporal line marks the upper edge of the area around the temporal fossa and gives attachment points for fascia. Students often confuse the line with the depression itself, but they are different structures. The line is a ridge, while the fossa is the shallow space below it.

### [Coronoid Process of the Mandible](/anatomy-physiology/key-terms/coronoid-process-of-the-mandible)

The coronoid process is the attachment site that the temporalis muscle inserts onto after crossing the temporal fossa. That relationship explains why the muscle can pull the mandible upward. On diagrams, it helps connect the skull’s sidewall to actual jaw movement.

## On the AP Exam

A lab practical or skull-labeling quiz may ask you to identify the temporal fossa on a diagram or cadaver image, often by using nearby landmarks like the zygomatic arch and temporal line. A short-answer question may ask what structure attaches there and what movement that muscle produces. The useful move is to name the fossa, connect it to the temporalis muscle, and then link that muscle to jaw elevation and retraction. If you are given a clinical or movement scenario, think about chewing strength, side-of-skull anatomy, and which bony surface provides the attachment space. Being able to point to the fossa quickly also helps when comparing it with other skull landmarks on an unlabeled bone.

## Key Takeaways

- The temporal fossa is a shallow depression on the side of the skull where the temporalis muscle attaches.
- It sits above the zygomatic arch and below the temporal line, which makes those landmarks useful for finding it on a skull model.
- The fossa matters because it supports jaw motion through the temporalis muscle, especially elevation of the mandible.
- It is a bony depression, not a muscle, not a joint, and not the same thing as the temporal line.
- Knowing the temporal fossa helps you connect skull anatomy to chewing mechanics and nearby landmarks in the lateral skull.

## FAQs

### What is the temporal fossa in Anatomy and Physiology I?

The temporal fossa is a shallow depression on the side of the skull. It gives the temporalis muscle space and attachment area. In A&P I, you usually study it as part of skull anatomy and jaw movement.

### Where is the temporal fossa located?

You find it on the lateral side of the skull, above the zygomatic arch and below the temporal line. If you are looking at a skull model, it is the broad area in the temple region, not the arch itself.

### What muscle attaches to the temporal fossa?

The temporalis muscle attaches to the temporal fossa. That muscle is one of the main muscles of mastication, so it helps elevate the mandible and close the jaw. Its attachment area is broad because it produces strong chewing force.

### Is the temporal fossa the same as the temporal line?

No. The temporal line is a ridge that marks a boundary on the skull, while the temporal fossa is the depressed area beneath it. They are close together, which is why they get mixed up on diagrams.

## Related Study Guides

- [7.2 The Skull ](/anatomy-physiology/unit-7/2-skull/study-guide/UlZ8y25gzC1E8srV)

## About This Document

Canonical Fiveable pages are available as Markdown at the same path plus `.md`.

- [llms.txt](https://fiveable.me/llms.txt): index of Fiveable's sections and URL patterns
- [llms-full.txt](https://fiveable.me/llms-full.txt): complete subject and unit listing
- [MCP server](https://fiveable.me/mcp): call Fiveable as tools instead of fetching pages (`https://fiveable.me/api/mcp`)
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