Anatomy and Physiology: Skull Bones Lecture by Ben from RegisteredNurseRN.com

Overview

• Focus: 22 skull bones, part of the axial skeleton.
• Division:
  • Cranial Bones (8 total — mostly single bones except for two pairs)
  • Facial Bones (14 total — mostly paired bones except for two single)

Cranial Bones (8 total)

Paired Bones (2)

1. Parietal Bones
   • Function: Make up the side walls of the cranium.
   • Tip: "Parietal" sounds like "pair", indicating two bones.
2. Temporal Bones
   • Location: Inferior to the parietal bones.
   • Function: Associated with the temple region (massaging relieves headaches).

Single Bones (4)

3. Frontal Bone
   • Location: Forehead; covers the frontal lobe of the brain.
   • Tip: "Forehead" and "frontal" both start with 'F'.
4. Sphenoid Bone
   • Shape: Butterfly-shaped, articulates with all cranial bones.
   • Location: Spans entire width of the cranium.
   • Tip: Looks like a specter (ghost), and spans cranium.
5. Ethmoid Bone
   • Origin: Name means "strainer"; cribriform plates with tiny holes.
   • Location: Inferior to frontal bone, between sphenoid and nasal bones.
   • Tip: Least visible in anterior view, known as the "enclosed cranial bone".
6. Occipital Bone
   • Meaning: "Behind the head"; covers occipital lobe (visual processing).

Mnemonic for Cranial Bones

• "Ethan's fried Spanish pasta tempted Octavia."

Facial Bones (14 total)

Single Bones (2)

1. Mandible
   • Function: Jawbone; strongest bone in the face.
   • Tip: "Manly mandible" for chiseled jawline.
2. Vomer
   • Structure: Thin, flat bone; forms inferior part of nasal septum.
   • Meaning: Named after a plowshare.

Paired Bones (12)

3. Nasal Bones
   • Function: Form the bridge of the nose.
   • Tip: "Nasal" directly relates to the nose.
4. Inferior Nasal Concha
   • Shape: Shell-shaped bones in the lower nose.
   • Tip: Inferior (lower) + Nasal (nose) + Concha (shell).
5. Lacrimal Bones
   • Location: Near tear ducts.
   • Tip: Associate with "lacrimal fluid" (tears).
6. Palatine Bones
   • Function: Make up the posterior part of the hard palate.
7. Zygomatic Bones
   • Function: Cheekbones.
8. Maxilla/Maxillary Bones
   • Function: Form the maximum area of the face.

Mnemonic for Facial Bones

• "My mouth's palate but never like zucchini in vinegar."

Associated Bones (Not technically skull bones)

1. Hyoid Bone
   • Shape: U-shaped, attaches to the tongue, aids in swallowing.
2. Auditory Ossicles (Ear Bones)
   • Composition: Malleus, Incus, Stapes (3 bones per ear).
   • Nicknames: Hammer, Anvil, Stirrup.

Additional Resources

• Online quiz available without registration.
• More anatomy videos available; potential future topics include cranial sutures and landmarks.
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These notes summarize the key points covered in the lecture by Ben from RegisteredNurseRN.com on skull bones, providing a foundation for further study and review of anatomy, particularly in the context of cranial and facial structures.