01: Introductory Concepts; Tour Of The Brain Flashcards
Lecture review question: True or false: The term ventral describes a structure as being anterior with respect to the coronal plane when discussing the brainstem or spinal cord, but inferior with respect to the horizontal plane when discussing other structures.
True
Lecture review question: True or false: The frontal lobe of the brain is located caudal with respect to the occipital lobe of the brain.
False
The frontal lobe is located rostral to the occipital lobe of the brain.
Lecture review question: Which of the following describes a plane in which the brain can be sectioned? Select all that apply.
Sagittal
Coronal
Horizontal
Rostral
Dorsal
Lateral
Sagittal
Coronal
Horizontal
Lecture review question: Which lobes of the brain are considered the primary lobes of the brain? Select all that apply.
Frontal lobe
Parietal lobe
Temporal lobe
Occipital lobe
Insula lobe
Frontal lobe
Parietal lobe
Temporal lobe
Occipital lobe
Lecture review question: Which of the following lobes of the brain is important for motor functions?
A. Frontal
B. Parietal
C. Temporal
D. Visual
A
Lecture review question: True or false: The median longitudinal fissure separates the left and right hemispheres of the brain.
True
Lecture review question: Which of the following structures are associated with the diencephalon? Select all that apply.
Thalamus
Cerebellum
Hypothalamus
Midbrain
Third ventricle
Cerebral aqueduct
Thalamus
Hypothalamus
Third ventricle
Lecture review question: Which of the following structures make up the brainstem? Select all that apply.
Medulla
Cerebellum
Pons
Hippocampus
Midbrain
Putamen
Medulla
Pons
Midbrain
Lecture review question: Which of the following structures can you see when looking at the ventral (inferior) surface of the brain? Select all that apply.
Mammillary bodies
Optic nerves and chiasm
Central sulcus
Precentral sulcus
Lateral sulcus
Brainstem
Cerebellum
Mammillary bodies
Optic nerves and chiasm
Brainstem
Cerebellum
Lecture review question: Which of the following structures separates the frontal lobe from the parietal lobe?
A. Median longitudinal fissure
B. Central sulcus
C. Lateral sulcus
D. Pre-occipital notch
B
Lecture review question: True or false: The postcentral gyrus lies posterior to the central sulcus.
True
Lecture review question: True or false: Broca’s area is located in the temporal lobe.
False
Broca’s area is located in the frontal lobe, left hemisphere.
Lecture review question: What are the key structural differences between the CNS and PNS?
The CNS contains the brain and spinal cord.
The PNS consists of all of all the remaining neural structures that connect to the CNS.
Lecture review question: What are the key functional differences between the somatic and visceral nervous systems?
The somatic nervous system sends information and controls voluntary muscles (skeletal muscles).
The visceral nervous system receives information and controls involuntary muscles such as cardiac and smooth muscle as well as glands.
Lecture review question: What are the major regions of the CNS?
Telencephalon: cerebral hemispheres
Diencephalon: thalamus, hypothalamus, epithalamus, and subthalamus
Cerebellum: balance, walking, standing, and other complex motor functions
Brainstem: contains the spinal cord; sends messages to the body
Lecture review question: What are localizing signs?
Signs observed during the neurological exam that may indicate a lesion or injury to a specific area of the brain or nervous system.
Lecture review question: Are dendrites the “sending” or “receiving” end of the neuron?
Receiving
Lecture review question: How are multipolar, pseudounipolar, and bipolar neurons different?
Multipolar: varied shape, 1 axon, multiple dendrites
Psuedopolar: round shape, single process with 2 branches at the end
Bipolar: oval shape, single process from each side of the body
Lecture review question: What is the main function of oligodendrocytes and Schwann cells?
Myelination
Lecture review question: What are the main differences between neurapraxia, axonotmesis, and neurotmesis?
Neurapraxia: focal damage to the axon without demyelination
Axonotmesis: demyelination with direct axonal damage
Neurotmesis: Severed nerve; likely irreparable damage
Lecture review question: Can you see the optic chiasm in the lateral or ventral view of the brain?
Ventral
Lecture review question: Can you see the central sulcus in a lateral or ventral view of the brain?
Lateral
Lecture review question: What sulcus separates the frontal and parietal lobes?
Central sulcus
Lecture review question: What gyrus lies rostral to the central sulcus? Which lies caudal?
Rostral: precentral gyrus
Caudal: postcentral gyrus
Lecture review question: What are the names of the 4 primary lobes of the cerebral cortex?
Frontal, parietal, temporal, occipital
Lecture review question: What structures are considered deep structures of the cerebral cortex?
Basal ganglia, lambic structures, internal capsule
Lecture review question: What are the names of the nuclei that make up the basal ganglia?
Caudate, putamen, globus pallidus
Lecture review question: What areas of the brain are considered part of the brainstem?
Medulla, pons, midbrain
Lecture review question: What part of the brain is located posterior to the brainstem?
Cerebellum
Lecture review question: How many ventricles are contained in the brain? What are their names?
Four ventricles
- (2) lateral ventricles
- Third ventricle (in the diencephalon)
- Fourth ventricle (posterior to brainstem)
Lecture review question: Where is the third ventricle located?
Diencephalon
Your patient has damage to the spinal cord on the left side of their body. Which side of the body would you expect to see sensory and motor deficits?
A. Contralaterally (opposite side)
B. Ipsilaterally (same side)
C. Cross pattern (both sides)
B
Your patient has damage to the left cerebral hemisphere. Which side of the body would you expect to see sensory and motor deficits?
A. Contralaterally (opposite side)
B. Ipsilaterally (same side)
C. Cross pattern (both sides)
A
Your patient has damage to the brainstem on the left side. Which side of the body would you expect to see sensory and motor deficits?
A. Contralaterally (opposite side)
B. Ipsilaterally (same side)
C. Cross pattern (both sides)
C
True or false: Gray matter is the cell body of neurons.
True
Gray matter is the cell body of neurons while white matter is the axons. NOTE: Terms used to describe the gray and white matter will change depending on whether you’re talking about the CNS or PNS.
The gray matter of the Central Nervous System contains all of the following EXCEPT:
A. Peripheral nerves
B. Nuclei
C. Horns
D. Lamina
E. Cortex
A
The gray matter of the Peripheral Nervous System contains all of the following EXCEPT:
A. Spinal nerves
B. Cranial nerves
C. Nuclei
D. Rami
C
The white matter of the Central Nervous System contains all of the following EXCEPT:
A. Tracts
B. Ganglia
C. Fasciculi
D. Funiculi
E. Lemnisci
B
The white matter of the Peripheral Nervous System contains which of the following:
A. Tracts
B. Ganglia
C. Fasciculi
D. Funiculi
E. Lemnisci
B
True or false: Efferent neurons carry information from sensory receptors of the skin and other organs to the central nervous system (i.e., brain and spinal cord).
False
Afferent neurons carry information from sensory receptors of the skin and other organs to the central nervous system (i.e., brain and spinal cord), whereas efferent neurons carry motor information away from the central nervous system to the muscles and glands of the body.
The somatic nervous system:
A. Regulates cardiac and smooth muscle and glands
B. Conveys sensory information from the periphery
C. Conveys sensory information from the viscera
D. None of the above
B
True or false: The sympathetic and parasympathetic nervous systems are branches of the autonomic (visceral) nervous system.
True
Which of the following regulates the movement of skeletal muscle?
A. Autonomic nervous system
B. Sympathetic nervous system
C. Parasympathetic nervous system
D. Somatic nervous system
D
The following italicized description describes which of the following imaging methods?
A coil is placed on the scalp while a magnetic field creates a current to stimulate nerve cells in the brain.
A. Computed tomography (CT scan)
B. Magnetic resonance imaging (MRI)
C. Magnetic resonance angiography (MRA)
D. Positron emission tomography (PET)
E. Transcranial magnetic stimulation (TMS)
E
The following italicized description describes which of the following imaging methods?
This method allows clinicians to visualize arteries and veins by measuring the velocity of blood flow within them.
A. Computed tomography (CT scan)
B. Magnetic resonance imaging (MRI)
C. Magnetic resonance angiography (MRA)
D. Positron emission tomography (PET)
E. Transcranial magnetic stimulation (TMS)
C
The following italicized description describes which of the following imaging methods?
A special dye (radioactive tracer) is injected into the bloodstream to measure metabolic activity in tissue such as blood flow, glucose, and oxygen.
A. Computed tomography (CT scan)
B. Magnetic resonance imaging (MRI)
C. Magnetic resonance angiography (MRA)
D. Positron emission tomography (PET)
E. Transcranial magnetic stimulation (TMS)
D
The following italicized description describes which of the following imaging methods?
This method measures the effects that tissue density has on stopping an x-ray beam; these results are transformed into numbers by a computer which forms an image.
A. Computed tomography (CT scan)
B. Magnetic resonance imaging (MRI)
C. Magnetic resonance angiography (MRA)
D. Positron emission tomography (PET)
E. Transcranial magnetic stimulation (TMS)
A
The following italicized description describes which of the following imaging methods?
This method measures the effects of a magnetic field on protons within tissue; the effect is measured when protons relax. The resulting image is highly detailed; this method is typically used to scan the brain and spinal cord.
A. Computed tomography (CT scan)
B. Magnetic resonance imaging (MRI)
C. Magnetic resonance angiography (MRA)
D. Positron emission tomography (PET)
E. Transcranial magnetic stimulation (TMS)
B
True or false: Within the microtubule system of the axon, anterograde describes the “forward” movement of information transport from the cell body to the axon terminals.
True
Retrograde describes the “backward” movement of information from the axon terminal to the cell body.
Another term for the cell body is:
A. Dendrites
B. Axon
C. Soma
D. Bouton
C
This part of the neuron is the “receiving end”:
A. Soma
B. Dendrites
C. Axon
D. Terminal bouton
B
This part of the neuron is the “sending end”:
A. Soma
B. Dendrites
C. Axon
D. Terminal bouton
C
What is the correct order going from proximal to distal of the following neuronal components?
A. Terminal bouton > terminal arbors > initial segment > axon hillock
B. Axon hillock > initial segment > terminal arbors > terminal bouton
C. Initial segment > axon hillock > terminal arbors > terminal bouton
D. Initial segment > terminal arbors > terminal bouton > axon hillock
B
The action potential begins in which part of the neuron?
A. Terminal bouton
B. Terminal arbors
C. Initial segment
D. Axon hillock
C
True or false: Only the axon is surrounded by a neuronal membrane.
False
The entire neuron is surrounded by a neuronal membrane.
True or false: Myelinated neurons conduct at a higher rate of speed.
True
True or false: The Nodes of Ranvier are not myelinated.
True
The ___________ surrounds multiple fascicles of nerve fibers.
A. Epineurium
B. Perineurium
C. Fascicle
D. Endoneurium
A
The ___________ is a bunch or bundle of axons.
A. Epineurium
B. Perineurium
C. Fascicle
D. Endoneurium
C
The ___________ surrounds each fascicle of nerve fibers.
A. Epineurium
B. Perineurium
C. Fascicle
D. Endoneurium
B
The ___________ wraps around a single axon.
A. Epineurium
B. Perineurium
C. Fascicle
D. Endoneurium
D
Order the ensheathment of nerve fibers from superficial to deep.
A. Epineurium > Endoneurium > Perineurium
B. Endoneurium > Epineurium > Perineurium >
C. Perineurium > Epineurium > Endoneurium >
D. Epineurium > Perineurium > Endoneurium
D