What is the perpendicular plate?

What is the perpendicular plate?

Medical Definition of perpendicular plate 1 : a flattened bony lamina of the ethmoid bone that is the largest bony part assisting in forming the nasal septum. 2 : a long thin vertical bony plate forming part of the palatine bone — compare horizontal plate.

What is located directly between the eyes and contains the cribriform plate and crista galli?

In the cranial cavity, the ethmoid bone forms a small area at the midline in the floor of the anterior cranial fossa. This region also forms the narrow roof of the underlying nasal cavity. This portion of the ethmoid bone consists of two parts, the crista galli and cribriform plates.

What is the cribriform plate quizlet?

The cribriform plate forms the roof of the nasal cavity. It allows the sensory nerves for smell to pass to the brain.

What is also known as the cribriform plate?

The cribriform plate (less commonly also called the lamina cribrosa of the ethmoid bone) is a sieve-like structure between the anterior cranial fossa and the nasal cavity. It is a part of ethmoid bone and supports the olfactory bulb, which lies in the olfactory fossa.

Is the perpendicular plate a bone?

The perpendicular plate of palatine bone is the vertical part of the palatine bone, and is thin, of an oblong form, and presents two surfaces and four borders….

What does the perpendicular plate articulate with?

The anterior border articulates with the spine of the frontal bone and the crest of the nasal bones. The posterior border articulates by its upper half with the sphenoidal crest, by its lower with the vomer.

What is not part of the ethmoid bone?

What bony feature is NOT part of the ethmoid bone? The sella turcica is a saddle-shaped bony prominence. In the center of the sella turcica is the hypophyseal fossa, which houses the pituitary gland (a.k.a. hypophysis).

Do humans have a cribriform plate?

CSF rhinorrhoea (clear fluid leaking from the nose) is very serious and considered a medical emergency. Aging can cause the openings in the cribriform plate to close, pinching olfactory nerve fibers….

What bones contain paranasal sinuses?

Paranasal sinuses are named after the bones that contain them: frontal (the lower forehead), maxillary (cheekbones), ethmoid (beside the upper nose), and sphenoid (behind the nose).

Where is the olfactory foramina?

Base of the skull. Upper surface. The olfactory foramina, also known as the cribriform foramina (cribr- is “a sieve” in Greek), is the grouping of holes located on the cribriform plate.

What is perpendicularity control?

The perpendicularity control specifies that the rear wall must be perpendicular to both datums [A] and [B]. The figure below shows the tolerance zone for the back wall.

Which lines of a quadrilateral are perpendicular to each other?

Lines m and n are perpendicular. If the slope of m is zero, then the slope of n is Line j passes through the points (0, 0) and (c, d). Line k passes through the points (0,0) and (-d, c). Lines j and k are Given quadrilateral RSTU, determine if each pair of sides (if any) are parallel and which are perpendicular for the coordinates of the vertices.

Is the tolerance zone perpendicular to the datum?

The tolerance zone is perpendicular to both datum [A] and datum [B]. In order to understand datums [A] and [B], it’s helpful to consider the gage in the figure below. While the bottom and side of the dog house are designated as datum features, it’s the gage that represents the datums. The datums are perfect planes.

Are the lines m and n perpendicular to each other?

Lines m and n are perpendicular. If the slope of m is zero, then the slope of n is Line j passes through the points (0, 0) and (c, d).