1What constitutes the central nervous system (CNS)?
The brain and spinal cord.
2What links the CNS to the rest of the body?
The peripheral nervous system (PNS), including spinal and cranial nerves.
3What are the components of the brainstem?
Midbrain, pons, and medulla.
4What is the role of the cerebral cortex?
It is involved in conscious thought, sensory integration, and motor function.
5What are the subcortical nuclei?
Basal ganglia and thalamus.
6What do the lobes of the cerebral hemispheres correspond to?
They are named after the bones of the skull overlying them.
7What happens when Broca's area is damaged?
It leads to Broca's aphasia, causing difficulty generating written or spoken language while language comprehension remains intact.
8What happens when Wernicke's area is damaged?
It leads to Wernicke's aphasia, where speech can be fluent but is often meaningless due to difficulty understanding language.
9What is the function of the corpus callosum?
It connects the two cerebral hemispheres and allows the passage of commissural fibers.
10What are the three types of cerebral white matter tracts?
Association fibers, commissural fibers, and projection fibers.
11Where does the spinal cord terminate?
It terminates caudally as the conus medullaris around the L1/L2 vertebral level.
12How many pairs of spinal nerves are there?
There are 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal.
13What do ventral rootlets and roots carry?
They carry axons of somatic motor neurons, sympathetic neurons (T1-L2), and parasympathetic neurons (S2-S4).
14What do dorsal rootlets and roots contain?
They contain the central processes of pseudo-unipolar somatic sensory neurons and visceral afferent sensory neurons.
15How is a spinal nerve formed?
By the combination of ventral and dorsal roots.
16What are the four main lobes of the cerebral hemispheres?
Frontal, parietal, temporal, and occipital lobes.
17What is the function of the frontal lobe?
It is responsible for motor functions, problem-solving, memory, language, and judgment.
18What is the primary role of the parietal lobe?
It processes sensory information such as touch, temperature, and pain.
19What does the temporal lobe handle?
It is involved in auditory processing, memory, and recognizing complex stimuli like faces.
20What is the function of the occipital lobe?
It is primarily responsible for visual processing.
21What structure connects the two cerebral hemispheres?
The corpus callosum.
22What type of fibers connect cortical areas within the same hemisphere?
Association fibers.
23What type of fibers connect cortical areas between the two hemispheres?
Commissural fibers.
24What type of fibers connect the cortex with subcortical structures?
Projection fibers.
25What is the thalamus's primary role?
It acts as a relay center for sensory and motor signals to and from the cerebral cortex.
26What does the basal ganglia control?
It regulates voluntary motor movements, procedural learning, and emotions.
27Where is the Broca’s area located?
In the inferior frontal gyrus of the dominant hemisphere, usually the left.
28What is the function of the Broca’s area?
It generates language and speech production.
29Where is the Wernicke’s area located?
In the superior temporal gyrus of the dominant hemisphere.
30What is the function of the Wernicke’s area?
It is responsible for language comprehension.
31What is the role of the cerebellum?
It coordinates voluntary movements, balance, and posture.
32How many cranial nerves are there?
There are 12 pairs of cranial nerves.
33What does the peripheral nervous system include?
Nerves that link the CNS to the rest of the body, including spinal and cranial nerves.
34What are the functions of the spinal cord?
It transmits sensory and motor signals between the brain and the body and controls reflexes.
35What does the conus medullaris represent?
The tapered end of the spinal cord, usually located at the L1/L2 level.