Cribriform plate
Explicación
The cribriform plate of the ethmoid bone contains multiple foramina that allow the passage of olfactory nerves (CN I) from the nasal cavity to the olfactory bulbs in the brain.
Ethmoid bone
Explicación
The ethmoid bone contains the cribriform plate, which transmits the olfactory nerves from the nasal cavity to the brain.
Forms the superior nasal septum
Explicación
The perpendicular plate forms the superior part of the nasal septum, contributing to the division of the nasal cavity into two nostrils.
Sella turcica
Explicación
The sella turcica, a part of the sphenoid bone, houses the pituitary gland, making it a crucial feature for endocrine function.
Sella turcica
Explicación
The sella turcica is a saddle-shaped depression on the sphenoid body that houses the pituitary gland (hypophysis).
Parietal, occipital, sphenoid, zygomatic, mandibular
Explicación
The temporal bones articulate with the parietal, occipital, sphenoid, zygomatic, and mandible bones, providing structural connections at the sides of the skull.
Posterior wall of the orbits and middle cranial fossa
Explicación
The greater wings form part of the middle cranial fossa and the lateral walls of the orbits, and contain foramina for cranial nerves.
Attachment for neck muscles
Explicación
The mastoid process provides attachment points for neck muscles, facilitating head movement and stability.
Mastoid process
Explicación
The mastoid process contains mastoid air cells, which are connected to the middle ear and involved in air conduction and temperature regulation.
Forms the medial wall of the nasal cavity and part of the nasal septum
Explicación
The ethmoid bone forms the medial wall of the nasal cavity and contributes to the nasal septum, playing a key role in nasal structure.
Transmits the middle meningeal artery
Explicación
The foramen spinosum transmits the middle meningeal artery, a key vessel supplying the dura mater.
Sphenoid processes
Explicación
Sphenoid processes serve as attachment points for dura mater, muscles, and ligaments, highlighting the sphenoid's central role in skull anatomy.
Lamina papyracea
Explicación
The lamina papyracea, part of the ethmoid bone's lateral mass, forms the medial wall of the orbit.
Pterygoid muscles involved in mastication
Explicación
The pterygoid processes provide attachment points for the lateral and medial pterygoid muscles that are important in mastication.
Squamous part
Explicación
The squamous part of the temporal bone forms the anterior and posterior walls of the external acoustic meatus.
Lesser wing
Explicación
The optic canal is located in the lesser wing of the sphenoid bone, allowing passage of the optic nerve and ophthalmic artery.
Contain ethmoidal air cells (ethmoidal sinuses) and scroll-shaped conchae
Explicación
The lateral masses of the ethmoid contain ethmoidal air cells (sinuses) and are grooved to form the superior and middle conchae.
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Ethmoid bone — localization?
Unpaired, anterior skull base, joins frontal, nasal, sphenoid bones.
Ethmoid — role?
Supports nasal septum, transmits olfactory nerves.
Ethmoid bone — parts?
Cribriform plate, perpendicular plate, lateral masses, conchae.
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