Orbital structures — Flashcards

10 flashcards

Identify the area of the retina responsible for high-resolution central vision:

What structure of the eye is the site where the optic nerve exits the retina and is known as the physiological blind spot?

What vessel drains blood from the retina and travels through the center of the optic nerve?

Fractures to the _____ most commonly result from direct frontal trauma to the orbit due to assault, motor vehicle crashes, or sports injuries

CN IX (Cranial Nerve 9) name?

parafollicular cells (C-cells) of thyroid

Embryological origin of the bones of the skull:

Into what vein do the dural venous sinuses empty?

Olfactory deficits are often caused by head injuries that fracture the _____ of the ethmoid bone

#10

The majority of the external ear receives sensory innervation via nerves derived from what two nerve roots? _____

Orbital structures US Medical PG Flashcards - Medical Study Cards

Master Orbital structures with OnCourse flashcards. These spaced repetition flashcards are designed for medical students preparing for NEET PG, USMLE Step 1, USMLE Step 2, MBBS exams, and other medical licensing examinations.

Orbital structures Flashcard Deck - 10 Cards

Flashcard 1: Identify the area of the retina responsible for high-resolution central vision:

Answer: Macula

Extra: The macula is an oval-shaped pigmented area near the center of the retina, located temporal to the optic disc. It contains the fovea centralis, which has the highest concentration of cone cells and is responsible for high-resolution central vision.

Flashcard 2: What structure of the eye is the site where the optic nerve exits the retina and is known as the physiological blind spot?

Answer: Optic disc

Flashcard 3: What vessel drains blood from the retina and travels through the center of the optic nerve?

Answer: Central retinal vein

Flashcard 4: Fractures to the _____ most commonly result from direct frontal trauma to the orbit due to assault, motor vehicle crashes, or sports injuries

Answer: orbital floor

Flashcard 5: CN IX (Cranial Nerve 9) name?

Answer: Glossopharyngeal nerve

Extra: Functions of Cranial Nerve IX (Glossopharyngeal): 1. Motor: Stylopharyngeus muscle. 2. Sensory: Posterior 1/3 of tongue, tonsils, pharynx, middle ear, carotid body/sinus. 3. Taste: Posterior 1/3 of tongue. 4. Parasympathetic: Parotid gland (via otic ganglion). 5. Reflexes: Afferent limb of the gag reflex.

Flashcard 6: parafollicular cells (C-cells) of thyroid

Answer: neural crest

Flashcard 7: Embryological origin of the bones of the skull:

Answer: Neural crest cells and Paraxial mesoderm

Extra: The bones of the skull have dual embryological origins: 1. **Neural Crest Cells:** Form the bones of the face (viscerocranium) and parts of the neurocranium (e.g., frontal bone, sphenoid). 2. **Paraxial Mesoderm:** Forms the rest of the neurocranium (e.g., parietal bones, occipital bone).

Flashcard 8: Into what vein do the dural venous sinuses empty?

Answer: internal jugular vein

Flashcard 9: Olfactory deficits are often caused by head injuries that fracture the _____ of the ethmoid bone

Answer: cribriform plate

Extra: Watch associated Bootcamp video [https://app.bootcamp.com/med-school/gross-anatomy/videos/external-examination-of-the-brain?index=12] https://onlinemeded.org/spa/neurology?ref=anki

Flashcard 10: The majority of the external ear receives sensory innervation via nerves derived from what two nerve roots? _____

Answer: C2, C3

Extra: https://onlinemeded.org?ref=anki

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Orbital structures Flashcards for USMLE

Study 10 flashcards on Orbital structures for USMLE Anatomy. These active recall cards cover the key concepts, clinical associations, and high-yield facts from this chapter of Head & Neck. Each card is designed to test your understanding rather than just recognition, building stronger and more durable memories for exam day.

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There are 10 flashcards for Orbital structures, covering the key concepts, clinical correlations, and high-yield facts from this chapter of Head & Neck.

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