Skull
This type of ossification replaces cartilage with bone and forms the base of the skull
What is endochondral ossification?
Located immediately anterior to the central sulcus within the frontal lobe, this gyrus serves as the primary motor cortex
What is the precentral gyrus?
This is the total number of cervical spinal nerves found in the human vertebral column
What is eight?
The sympathetic nervous system features a thoracolumbar outflow arising from spinal cord levels T1 to L2 (3), whereas the parasympathetic system features this type of outflow
What is craniosacral outflow?
As a thick, dense, and tough fibrous membrane forming the outer covering of the central nervous system, the cranial dura mater is uniquely composed of these two distinct layers that separate from one another to create dural venous sinuses
What are the periosteal layer and the meningeal layer?
This bone forms a major portion of the anterior cranial fossa and features the cribriform plate and crista galli
What is the ethmoid bone?
This massive middle bundle of white matter fibers connects the pons directly to the cerebellum
What is the middle cerebellar peduncle?
Serving as the direct cervical continuation and anatomical enlargement of the supraspinous ligament, this specialized fibrous membrane provides posterior support and muscle attachment in the neck
What is the ligamentum nuchae (nuchal ligament)?
Originating from a specific brainstem nucleus, preganglionic parasympathetic fibers carried by the facial nerve synapse at these two distinct ganglia in the head
What are the pterygopalatine ganglion and the submandibular ganglion?
Because the facial veins and ophthalmic veins are entirely valveless, an infection originating in this region of the face can spread directly back into the cavernous sinus
What is the "Danger Triangle" of the face?
Located in the greater wing of the sphenoid bone, this foramen transmits the maxillary nerve (V2) directly into the pterygopalatine fossa
What is the foramen rotundum?
Containing cerebrospinal fluid, this specific fluid-filled space within the diencephalon is bounded laterally by the left and right halves of the thalamus
What is the third ventricle?
Meaning "horse's tail," this collection of nerve rootlets and roots arises from the inferior end of the spinal cord and extends downward through the lumbar cistern
What is cauda equina?
Contrary to the common rule that most splanchnic nerves carry preganglionic fibers, these specific splanchnic nerves are made up of postganglionic sympathetic fibers
What are cardiac splanchnic nerves?
Located in the greater wing of the sphenoid bone, this specific skull foramen transmits the middle meningeal artery into the middle cranial fossa
What is the foramen spinosum?
Situated between the greater and lesser wings of the sphenoid bone, the superior orbital fissure contains which cranial nerves
What are cranial nerves III, IV, V1, VI?
This specific lobe of the cerebrum is positioned medially rather than laterally, is primarily functional rather than strictly anatomical in classification
What is the limbic lobe?
Exhibiting a single process that divides into a peripheral and central branch, this specific neuronal shape characterizes first-order sensory neurons located in the dorsal root ganglia
What is pseudounipolar?
While the greater, lesser, and least thoracic splanchnic nerves carry preganglionic sympathetic fibers that pass through the chain without synpasing to reach preaortic ganglia, they originate from these specific spinal cord segments
What are spinal levels T5 through T12?
Located near the internal occipital protuberance, the confluence of sinuses serves as a meeting point that receives blood from these three specific dural sinuses
What are the superior sagittal, straight, and occipital sinuses?
Situated between the styloid and mastoid processes on the inferior surface of the temporal bone, this specific cranial nerve exits the skull through the stylomastoid foramen
What is the facial nerve (CN VII)?
These cranial nerves, which contain mixed fibers, are heavily associated with the pharyngeal arches
What are CN V, CN VII, CN IX, CN X?
Formed as triangular lateral extensions of the pia mater that pierce the arachnoid mater to anchor the spinal cord laterally, this specialized structure provides structural stabilization
What is the denticulate ligament?
After preganglionic parasympathetic fibers from the inferior salivatory nucleus synapse at the otic ganglion, postganglionic fibers travel to the parotid gland by hitchhiking on this specific branch of the mandibular nerve
What is the auriculotemporal nerve?
Located within the lateral wall of the cavernous sinus are cranial nerves III, IV, V1, and V2, while these two structures run more medially through the sinus cavity
What is the abducent nerve (CN VI) and internal carotid artery?