Central Nervous System Flashcards
What is the reticular formation associated with?
Consciousness, arousal, attention, movement, and pain
Controls speed, intensity, coordination, direction of complex voluntary movements, speech, gives us smoothness and gracefulness to our movements, and balance
Cerebellum
Problems with this area result in too little movement or too much movement like in Parkinson’s
Basal ganglia
Having blindsight when this area is damaged
Occipital lobe
Postcentral gyrus. Part of parietal lobe responsible for touch sensory input
Primary somatosensory cortex
What do homunculus’ represent?
Different parts of the body have different amounts of brain space for sensory and motor
Primary visual cortex
Occipital lobe
What does the reticular formation do?
Stimulates forebrain
This area is the origin of photosensitive epilepsy
Occipital lobe
Separates the precentral and post central gyri
Central sulcus
Why is the brain wrinkly?
Increase surface area
Associated with motor control and reward
Basal ganglia
Lowered areas of the brain
Sulci
Receives sensory info and regulatory info
Thalamus
What does the medulla do?
Vital processes necessary for life including breathing, HR and BP
Visual gaze of auditory stimuli. Midbrain
Superior colliculus
Plays a role in different stages of sleep and decides if we should wake up or not
Thalamus
Part of the hypothalamus, memory. Limbic
Mammillary bodies
Primary auditory cortex
Temporal lobe
What path does smell take that is different than other senses
It goes to the cortex then the thalamus
Impulse control and delayed gratification (waiting for a reward)
Orbitofrontal cortex
Where is the periaqueductal gray
Near the area where the CSF would flow through
Executive functions like attention, working memory, and goal directed behavior
Dorsolateral PFC
What is cerebellar agenesis?
Never growing a cerebellum. The gap is filled with CSF
Spatial info processing and stress feedback
Hippocampus
Plays key roles in threat detection, fear, excitement, and arousal by sending messages to other areas
Amygdala
Gateway to the cortex or sensory switchboard
Thalamus
This area is juxtaposed to the somatosensory cortex
Motor cortex
Declarative memory formation and stress. Limbic
Hippocampus
What makes up the myelencephalon?
Medulla
Plays a role in implicit procedural memories (muscle memory is linked)
Basal ganglia
Reward. Limbic
Septal area
What makes up the forebrain?
Diencephalon and telencephalon
Responding emotionally to bad choices. If damaged, people won’t care if they make a terrible choice
Orbitofrontal cortex
What are results of damage to the cerebellum?
Movement/balance/coordination problems, speech problems, subtle effects on cognition, possibly autism spectrum disorder
Eye movements, spatial orientation, and memory. Limbic
Posterior cingulate gyrus
Primary somatosensory cortex
Post central gyrus of parietal lobe
Sensory processing, motor commands, higher brain functions
Cerebral cortex
Participates in states of consciousness, learning and memory
Thalamus
The regulatory center responsible for maintaining a constant internal state (homeostasis)
Hypothalamus
What does chordate mean?
It has a backbone and will have a true brain
Bridge that connects the cerebral cortex to the cerebellum
pons
Decision making, knowing you made a mistake, emotion, looking forward to reward, physical and social pain
Anterior cingulate cortex
Visual and auditory association areas
Temporal lobe
Raised areas of the brain
Gyri
This area of the brain controls the pituitary gland through hormones
Hypothalamus
Olfaction (smell). Limbic
Olfactory bulbs
What inputs does the cerebellum receive from the spinal cord?
Current location of body
What is the pons involved in?
audition, balance, sleep, excitatory arousal (general excitatory state), motion sickness
Movement control diseases associated with the basal ganglia
Huntington’s and Parkinson’s
When does unilateral neglect occur?
Parietal lobe damage almost always on the right parietal lobe
Why can the hippocampus be widely studied?
Its structure is similar in many species
Group of subcortical structures in the forebrain that help to control/filter movement
Basal ganglia
What area is damaged in Wenickes aphasia?
Temporal lobe
Fear, aggression, memory, motivation.Limbic
Amygdala
Natural pain management, highest concentration of endorphin receptors. Midbrain
Periaqueductal gray
Located at the top and sides of the frontal lobes
Dorsolateral PFC
Memory. Limbic
Parahippocampal gyrus
Netlike mixture of neurons and nerve fibers throughout the medulla and pons
Reticular formation (reticular activating system)
This area of the midbrain is reduced in Parkinson’s
Substantia nigra
What makes up the hindbrain?
Myelencephalon and metencephalon
Precentral gyrus. Part of the frontal lobe responsible for initiating voluntary body movement
Primary motor cortex
Located above and behind the eyes in frontal lobe
Orbitofrontal cortex
What makes up the diencephalon?
Thalamus and hypothalamus
Dopamine releasing are, motor output pathway. Midbrain
Substantia nigra
What makes up the midbrain?
Mesencephalon
Decision making, error detection, emotion, anticipation of reward, pain and empathy. Limbic
Anterior cingulate cortex
What is unilateral neglect?
Parietal lobe damage that causes you to only be able to have left or right side when viewing things
What makes up the metencephalon?
Pons and cerebellum
Wernickes area
Temporal lobe. Able to understand language but not produce comprehensible language
Outermost part of the forebrain in two hemispheres
Cerebral cortex
What NT releasing centers are in the pons?
Raphe nuclei (serotonin) and locus coeruleus (NE)
What is the goal of the human connectome?
To answer how an individual brain is connected and map the connections at many different scales
Located at the ends of the hippocampus. Will be focused on in emotions, stress, and anxiety
Amygdala
What is contained in the medulla and many other structures?
Reticular formation
Eye movements, spatial orientation, memory, consciousness
Posterior cingulate cortex
Much of the limbic system is here
Temporal lobe
Most rostral/anterior part of the cerebral cortex
Frontal lobe
Four parts of the midbrain
Periaqueductal gray, red nucleus, substansia nigra, and superior and inferior colliculi
How do neurons and brain regions function?
They are part of circuits that influence behaviors, they don’t act in isolation
Roles in motor function, language, memory, many executive functions like planning, responsible choices, etc.
Frontal lobe
Many reciprocal connections with limbic system, basal ganglia, and other parts of the cortex
Dorsolateral PFC
Motor output pathway important for eye blinking. Midbrain
Red nucleus
Where are gray and white matter in the cerebral cortex
Gray is superficial and white is deep
Cognitive control diseases associated with the basal ganglia
ADHD and OCD
Regulates eating, drinking, sex, biorhythms (circadian, sleep/wake), temperature control
Hypothalamus
Localization of auditory stimuli. Midbrain
Inferior colliculus
What inputs does the cerebellum receive from the cerebral cortex (pons)?
Intended movements. Implements motor plan and corrects as needed (error detector)
How many layers of the cortex are there?
6
What is EQ ratio?
Brain size to body size. Humans have the best
What makes up the telencephalon?
Subcortical structures and cerebral cortex
Contains motor cortex, prefrontal cortex, dorsolateral prefrontal cortex, oribitofrontal, and Brocas area
Frontal lobe
Association cortex
Dorsal parietal lobe
This area of the brain directs the autonomic nervous system
Hypothalamus
What is blindsight
Not being able to see but you can still tell if something is light or dark
Specialized for skin senses and senses that inform us about body position and movement. Spatial perception
Parietal lobe
Aggression, regulation of hunger, thirst, sex, temp, circadian rhythms, hormones. Limbic
Hypothalamus
The junction between the spinal cord and the brain
Medulla
New declarative memory formation (the things we know we know)
Hippocampus
Large sulcus, often an anatomical landmark
Fissure
Connects the hippocampus to mammillary bodies and other parts of the brain. Limbic
Fornix
This area of the frontal lobe is associated with schizophrenia
Dorsolateral prefrontal cortex