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By the end of this section, you will be able to:
  • List and identify the bones of the brain case and face
  • Locate the major suture lines of the skull and name the bones associated with each
  • Locate and define the boundaries of the anterior, middle, and posterior cranial fossae, the temporal fossa, and infratemporal fossa
  • Define the paranasal sinuses and identify the location of each
  • Name the bones that make up the walls of the orbit and identify the openings associated with the orbit
  • Identify the bones and structures that form the nasal septum and nasal conchae, and locate the hyoid bone
  • Identify the bony openings of the skull

The cranium    (skull) is the skeletal structure of the head that supports the face and protects the brain. It is subdivided into the facial bones    and the brain case    , or cranial vault ( [link] ). The facial bones underlie the facial structures, form the nasal cavity, enclose the eyeballs, and support the teeth of the upper and lower jaws. The rounded brain case surrounds and protects the brain and houses the middle and inner ear structures.

In the adult, the skull consists of 22 individual bones, 21 of which are immobile and united into a single unit. The 22nd bone is the mandible    (lower jaw), which is the only moveable bone of the skull.

Parts of the skull

In this image, the lateral view of the human skull is shown and the brain case and facial bones are labeled.
The skull consists of the rounded brain case that houses the brain and the facial bones that form the upper and lower jaws, nose, orbits, and other facial structures.

Anterior view of skull

The anterior skull consists of the facial bones and provides the bony support for the eyes and structures of the face. This view of the skull is dominated by the openings of the orbits and the nasal cavity. Also seen are the upper and lower jaws, with their respective teeth ( [link] ).

The orbit    is the bony socket that houses the eyeball and muscles that move the eyeball or open the upper eyelid.

Anterior view of skull

This image shows the anterior view (from the front) of the human skull. The major bones on the skull are labeled.
An anterior view of the skull shows the bones that form the forehead, orbits (eye sockets), nasal cavity, nasal septum, and upper and lower jaws.

Inside the nasal area of the skull, the nasal cavity    is divided into halves by the nasal septum    . The upper portion of the nasal septum is formed by the perpendicular plate of the ethmoid bone    and the lower portion is the vomer bone    . Each side of the nasal cavity is triangular in shape, with a broad inferior space that narrows superiorly. When looking into the nasal cavity from the front of the skull, two bony plates are seen projecting from each lateral wall. The larger of these is the inferior nasal concha    , an independent bone of the skull. Located just above the inferior concha is the middle nasal concha    , which is part of the ethmoid bone. A third bony plate, also part of the ethmoid bone, is the superior nasal concha    .

Lateral view of skull

A view of the lateral skull is dominated by the large, rounded brain case above and the upper and lower jaws with their teeth below ( [link] ). Separating these areas is the bridge of bone called the zygomatic arch. The zygomatic arch    is the bony arch on the side of skull that spans from the area of the cheek to just above the ear canal. It is formed by the temporal bone    (the cheekbone) and the zygomatic bone , extending forward from the temporal bone.

Questions & Answers

I'm interested in biological psychology and cognitive psychology
Tanya Reply
what does preconceived mean
sammie Reply
physiological Psychology
Nwosu Reply
How can I develope my cognitive domain
Amanyire Reply
why is communication effective
Dakolo Reply
Communication is effective because it allows individuals to share ideas, thoughts, and information with others.
effective communication can lead to improved outcomes in various settings, including personal relationships, business environments, and educational settings. By communicating effectively, individuals can negotiate effectively, solve problems collaboratively, and work towards common goals.
it starts up serve and return practice/assessments.it helps find voice talking therapy also assessments through relaxed conversation.
miss
Every time someone flushes a toilet in the apartment building, the person begins to jumb back automatically after hearing the flush, before the water temperature changes. Identify the types of learning, if it is classical conditioning identify the NS, UCS, CS and CR. If it is operant conditioning, identify the type of consequence positive reinforcement, negative reinforcement or punishment
Wekolamo Reply
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Wekolamo
because it helps many people around the world to understand how to interact with other people and understand them well, for example at work (job).
Manix Reply
Agreed 👍 There are many parts of our brains and behaviors, we really need to get to know. Blessings for everyone and happy Sunday!
ARC
A child is a member of community not society elucidate ?
JESSY Reply
Isn't practices worldwide, be it psychology, be it science. isn't much just a false belief of control over something the mind cannot truly comprehend?
Simon Reply
compare and contrast skinner's perspective on personality development on freud
namakula Reply
Skinner skipped the whole unconscious phenomenon and rather emphasized on classical conditioning
war
explain how nature and nurture affect the development and later the productivity of an individual.
Amesalu Reply
nature is an hereditary factor while nurture is an environmental factor which constitute an individual personality. so if an individual's parent has a deviant behavior and was also brought up in an deviant environment, observation of the behavior and the inborn trait we make the individual deviant.
Samuel
I am taking this course because I am hoping that I could somehow learn more about my chosen field of interest and due to the fact that being a PsyD really ignites my passion as an individual the more I hope to learn about developing and literally explore the complexity of my critical thinking skills
Zyryn Reply
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Jonathan
and having a good philosophy of the world is like a sandwich and a peanut butter 👍
Jonathan
generally amnesi how long yrs memory loss
Kelu Reply
interpersonal relationships
Abdulfatai Reply
What would be the best educational aid(s) for gifted kids/savants?
Heidi Reply
treat them normal, if they want help then give them. that will make everyone happy
Saurabh
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Source:  OpenStax, Skeletal system. OpenStax CNX. Apr 17, 2015 Download for free at https://legacy.cnx.org/content/col11779/1.1
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