Cranial Nerves
Which cranial nerve provides sensation to the face?
Trigeminal nerve CN V
Which lobe of the brain is located at the very back of the skull and is primarily responsible for processing visual information?
Occipital lobe
These cells produce myelin in the central nervous system.
Oligodendrocytes
How many layers make up the meninges?
Three
This disorder is caused by damage to the language areas of the brain.
Aphasia
Which cranial nerve is responsible for hearing and balance?
Cranial Nerve VIII (Vestibulocochlear)
What hemisphere is responsible for logical and analytical thinking, mathematics, and language?
The Left Hemisphere
What is the small gap between two neurons where chemical signals are transmitted?
Synapse
What is a clear, colorless liquid that cushions the brain, carries away waste, and flows through the subarachnoid space and ventricular system?
Cerebrospinal Fluid (CSF)
Characterized by resting tremors, rigidity, and bradykinesia (slowness of movement), this neurodegenerative disease is caused by the loss of dopamine-producing neurons in the substantia nigra.
Parkinson's Disease
Which cranial nerve provides motor innervation to the muscles of facial expression?
Facial nerve (CN VII)
Which lobe contains the primary auditory cortex?
Temporal
Parkinson’s disease, myasthenia gravis, and multiple sclerosis are all characterized by breakdowns in this cellular communication process.
Synaptic Signaling
What tiny, specialized glial cells in the CNS act as the primary immune defense by cleaning up cellular debris and responding to neuroactive foreign agents?
Microglia
Characterized by imprecise articulation, slurred output, and breathy voice quality, this motor speech disorder is caused by neurological damage that weakens or impairs the muscles used for speaking.
Dysarthria
What cranial nerve provides sensory and motor innervation to the pharynx, larynx, heart, and gut ?
The Cranial Nerve X (Vagus nerve)
What is located in the left frontal lobe, this specialized region is responsible for speech production.
Broca's Area
What is the rapid change in electrical potential that travels down a neuron's axon to transmit a signal, moving from a resting state of roughly -70\text{ mV} to a peak of +40\text{ mV}?
Action Potential
This vital vascular structure at the base of the brain connects the anterior and posterior blood supplies, providing a built-in safety mechanism if one major artery becomes blocked.
Circle of Willis
What autoimmune disease is characterized by muscle weakness due to the immune system attacking acetylcholine receptors at the neuromuscular junction?
Myasthenia Gravis
Which cranial nerve provides motor innervation to all intrinsic and extrinsic muscles of the tongue except for the palatoglossus?
Answer: Hypoglossal nerve (CN XII)
Hidden deep within the lateral sulcus, this "fifth lobe" of the cortex plays a critical role in processing gustatory information, visceral sensations, and motor control for speech.
Insular cortex (Insula)
Named after the gaps between myelin sheaths, this type of specialized nerve impulse conduction allows electrical signals to rapidly "jump" from node to node down an axon.
Saltatory Conduction
Formed by tight junctions of endothelial cells, astrocytic end-feet, and pericytes, this semi-permeable border highly restricts foreign substances in the blood from entering the central nervous system tissue.
Blood-Brain Barrier (BBB)
A patient has difficulty swallowing after a brainstem injury. Which brainstem structure is most likely involved?
Medulla