Chapter 7.1 Anatomy module

true

the sphenoid bone contains a sinus. The sphenoid bone contains the paired sphenoidal sinuses.

cheeck

identify the general location of the zygomatic arch. The zygomatic arch is a bony bridge formed between the zygomatic and temporal bones. It contributes to the prominence of the cheek.

true

the ethmoid bone contains sinuses. The ethmoid sinuses are also known as ethmoidal air cells. They are found on either side of the perpendicular plate.

false

the ethmoid bone is a facial bone. The ethmoid bone is part of the cranium

true

the ethmoid bone is part of the axial skeleton The axial skeleton consists of the skull, the vertebral column, and rib cage.

perpendicular plate

which part of the ethmoid bone forms the nasal septum? The perpendicular plate of the ethmoid bone forms the superior portion of the nasal septum. The inferior portion of the nasal septum is formed by the vomer.

inferior surface of the zygomatic process

where is the mandibular fossa located? The mandibular fossa is located immediately anterior to the external auditory meatus, just inferior to the proximal part of the zygomatic process.

reduce the weight of the skull

identify the primary function of the ethmoidal sinuses. The paranasal sinuses are found in the ethmoid, sphenoid, frontal, and maxillary bones. They encircle the nasal cavity and function to lighten the skull.

cribiform plate

identify the recessed area surrounding the crista galli. The paired cribriform plates surround the crista galli and contain the tiny olfactory foramina.

mandibular condyle

identify the region of the mandible that forms part of the temporomandibular joint. The mandibular condyle is a knoblike superior projection. It articulates with the mandibular fossa of the temporal bone to form the temporomandibular joint.

an shallow depression

identify the best description of the mandibular fossa. The term fossa refers to a landmark that has a concave surface.

floor of the skull

identify the location of the sphenoid bone. The sphenoid bone spans the width of the floor of the skull

occipital condyles

identify the occipital bone landmark that can not be palpated from the surface of the head. The occipital condyles are found on either side of foramen magnum. They articulate with the atlas and can't be palpated on the head or neck.

perpendicular plate

identify the part of the ethmoid bone that contributes to the nasal septum. The perpendicular plate is a plate like process that projects inferiorly on midline, forming the superior portion of the nasal septum.

false

the ethmoid bone forms the inferior portion of the nasal septum The perpendicular plate of the ethmoid bone forms the superior part of the nasal septum

structure of the palate

the mandible is not responsible for. The hard palate is composed of the palatine process of the maxilla and the horizontal plate of the palatine bone.

sagittal

the nasal septum occupies which anatomic plane? The nasal septum lies in a midsagittal plane, dividing the nasal cavity into right and left halves.

a depression

the sella turcica is best described as: The sella turcica is a depression in the central region of the sphenoid bone. It houses the pituitary gland.

d

which of the following is the only bone that normally moves in relation to the others? The bone at D forms a joint with the temporal bone (temporomandibular joint) that allows the mouth to open, close, and move laterally.

zygomatic bone and temporal bone

Identify the 2 bones that make up the zygomatic arch. The temporal process of the zygomatic bone and the zygomatic process of the temporal bone fuse to form the zygomatic arch.

occipital condyles

Identify the area of the occipital bone that articulates with the vertebral column. The occipital condyles are found on the inferior surface of the skull on either side of foramen magnum. They articulate with the first cervical vertebra, the atlas. This articulation allows us to flex and extend the skull in a nodding "yes" motion.

posterior surface and base of the cranium

Identify the location of the occipital bone The occipital bone makes up the posterior part of the cranium.

coroind process

Identify the part of the mandible that serves as a site of attachment for the temporalis muscle. The coronoid process is the anterior projection found on the top of the mandibular ramus. It serves as the insertion site for temporalis.

zygomatic process

Identify the region on the temporal bone that forms much of the zygomatic arch. The zygomatic process is the name of the elongated projection that extends out from the temporal bone reaching towards the zygomatic bone, forming most of the zygomatic arch.

temporal process

Identify the region on the zygomatic bone that forms part of the zygomatic arch. The temporal process of the zygomatic bone is a small bony projection that extends posteriorly to fuse with the zygomatic process of the temporal bone, forming the zygomatic arch.

foramen magnum

Name the opening in the occipital bone through which the spinal cord passes The foramen magnum is the opening through which the spinal cord passes.

facial

Which of the following categories is the best fit for the zygomatic arch? Although the zygomatic bone is a facial bone and the temporal bone is a cranial bone, the zygomatic arch is best described as a facial structure.

2

how many bones make up the nasal septum? The nasal septum is composed of the perpendicular plate of the ethmoid and the vomer.

a projection on the mandible

identify the best description of the mandibular condyle The mandibular condyle is the projection on the mandible that helps form the temporomandibular joint.

parietal bone

identify the bone that articulates superiorly with the temporal bone. The temporal bones make up the lateral surface of the cranium, occupying the region the ear is found in. The area above this is composed of the parietal bones, which meet at midline on the top of the skull to form the sagittal suture.

the olfactory nerve (CN I)

identify the cranial nerve that passes through the olfactory foramina. The olfactory nerves (CN I) pass through the olfactory foramina as they pass from the nasal cavity to the brain.

external auditory meatus

identify the hole that marks the opening of the ear canal on the superficial surface of the skull. The external auditory meatus is the obvious hole in the temporal bone. This opening conveys sound waves to the eardrum.

styloid process

identify the landmark on the temporal bone that is a pointy spine. The styloid process is a pointy, spinous projection that serves as a site of muscle attachment. It is easily broken off of human skull specimens.

crista galli

identify the landmark that serves as a site of attachment for the menings. The crista galli is a small plate-like projection visible in the anterior floor of the skull. The dura mater anchors to the crista galli, stabilizing the meninges and brain within the cranial cavity.

lambodoid

identify the large suture on the posterior surface of the skull at the border of the occipital bone. The lambdoid suture is found between the occipital bone and the patrietal and temporal bones.

in between the orbits

identify the location of the ethmoid bone. The ethmoid bone is a single bone with a complex shape. The top of this bone projects up into the floor of the cranium. The middle of this bone spans the distance between the orbits, and the lowest most portion forms the superior part of the nasal septum.

palatine bone

identify the posterior most region of the hard plate. The horizontal plates of the palatine bones articulate with the palatine processes of the maxillary bones. The palatine bones form the posterior one-third of the hard palate.

sella turcica

identify the region of the sphenoid bone in contact with the pituitary galnd. The sella turcica is a central depression that houses the pituitary gland.

lesser wings

identify the region of the sphenoid bone that contains the optic canal. The optic canals are passageways found in the lesser wings. They serve as a passageway for the optic nerve running from the eyeball to the optic chiasma.

mandibular fossa

identify the region of the temporal bone that articulates with the lower jaw. The mandibular fossa is a shallow depression of the temporal bone in which the mandibular condyle of the mandible articulates, forming the temporomandibular joint.

mondibular fossa

identify the region of the temporal bone that articulates with the mandible. The word fossa indicates that this landmark is a depression. The mandibular fossa of the temporal bone forms the socket in which the mandibular condyle of the mandible articulates, forming the temporomandibular joint.

zygomatic process

identify the region of the temporal bone that forms part of the zygomatic arch. The zygomatic process is a projection of the temporal bone. It forms part of the zygomatic arch.

mandible

identify the skull bone that can move independent of head movement. The mandible exhibits many types of motion such as: elevation, depression, protraction, retraction, all independent of head movement.

infraorbital foramen

identify the small hole on the maxillary bone located below the orbit. The conspicuous infraorbital foramen is located below the orbit on the maxillary bone, as its name indicates.

sagittal suture

identify the suture found between the 2 parietal bones. The parietal bones meet at midline on the top of the skull, forming the sagittal suture which runs along the midsagittal plane.

mandibular notch

name the U shaped border found between the mandibular condyle and the cornoid process. The mandibular notch is the name of the U shaped border found between the mandibular condyle and the coronoid process.

foramen magnum

name the foramen at letter c. The foramen magnum ("great hole") is the largest foramen in the skull and provides passage for the spinal cord.

impaired head and nech movements

since mastoid infections may spread to the brain, surgical removal of the mastoid process was once considered to be the best way to prevent brain inflammation. Unfortunately, this also had the side-effect of causing ____________ This region of the temporal bone is the origin for the sternocleidomastoid muscle, which, unilaterally, draws the head toward the ipsilateral shoulder and rotates head to the opposite side and, bilaterally, flexes the neck.

zygomatic bones

what is the anatomical name for the facial bones known as "cheeckbones?" The zygomatic bones are known as the cheekbones. Together, the zygomatic bone and the temporal bone form the zygomatic arch. This region is the bony foundation of the facial prominence known as the cheek.

vomer

which bone forms the inferior portion of the nasal septum? The vomer is a small facial bone that runs superiorly on midline to articulate with the perpendicular plate of the ethmoid, forming the inferior portion of the nasal septum.

lacrimal bone

which bone is NOT considered to be part of the cranium? The lacrimal bone is a tiny bone found in the medial portion of the orbit. It is a facial bone, not part of the cranium.

sphenoid

which cranial bone spans the width of the cranial floor? The sphenoid bone is the large bat shaped bone that spans the floor of the skull.

lacrimal

which facial bones fuse to form the upper jaw? The lacrimal bone along with the sphenoid, ethmoid, and frontal bones make up the medial wall of the orbit.

maxillary

which facial bones fuse to form the upper jaw? The fused maxillary bones are known as the maxilla, and form the upper jaw and part of the palate.

nasal

which facial bones makeup the central portion of the bridge of the nose? The 2 tombstone shaped nasal bones are found above the nasal cavity. They form a continuous bony bridge that connects the 2 sides of the face.

c

which of the designated bones articulates with both vomer and the nasal bones? The maxilla articulates with both the nasal bone and the vomer.

nasal

which of the following bones do not contain a sinus? The sinuses found in the skull are collectively known as the paranasal sinuses because they encircle the nasal cavity. The nasal bones are small tombstone shaped bones that form the bridge of the nose and don't contain sinuses.

ethmoid

which of the following bones is not a facial bone? The ethmoid bone forms the area of the cranium between the nasal cavity and the orbits.

frontal

which of the following bones is unparied? There is only one frontal bone. It forms the anterior portion of the cranium (the forehead region).

maxillary

which of the following facial bones contain a sinus? The maxillary bones contain the maxillary sinuses. They are the largest sinuses, located laterally to the nasal cavity in the region of the cheek.

foramen rotundum

which of the following foramen convey a branch of the trigerminal nerve (CN V)? The foramen rotundum and the foramen ovale serve as passageways for branches of the trigeminal nerve.

nasal septum

which of the following locations is not formed by part of the maxillae? The nasal septum is formed by the vomer and perpendicular plate of the ethmoid bone. The maxillary bone, although close in proximity, does not contribute to the structure of the nasal septum.

palatine processes

which part of the maxillary bones from the roof of the moutH? The palatine processes of the maxillary bones fuse on midline at the intermaxillary suture, forming the anterior portion of the hard palate (roof of the mouth).

forms the medial wall of the nasal cavity

which part of the nasal cavity is formed by the nasal septum? The nasal septum divides the nasal cavity in half on midline, thereby forming the medial wall of the nasal cavity on both the right and left sides.

mandibular condyle

which region of the mandible articulates with the cranium? The mandibular condyle of the mandible is a knob like projection that articulates with the mandibular fossa of the temporal bone.

medial

which surface of the maxillary bones fuse togeter? The medial surfaces of the right and left maxillary bones fuse together to form the upper jaw. The upper jaw is referred to as the maxilla.