CNS Terms Flashcards
Definition of
frontal lobe (position)
front/top (in front of central sulcus)
Definition of
Bottom-up selective action
Rapid, automatic notice of most salient stimuli; “vetoes” top-down (volitional) control
Definition of
Unimodal association cortex
Association cortex with 1 input source
Definition of
anterolateral system
fibers from spinal cord to thalamus & brainstem, for pain & temperature
Definition of
spinothalamic tract
fibers from spinal cord to thalamus
Definition of
brainstem
midbrain, pons, medulla
Definition of
gyri
ridges on cortical surface - increase surface area for cell bodies
Definition of
Thalamus LGN (abbreviation, def)
Thalamus Lateral Geniculate Nucleus; where optic nerves synapse in the brain
Definition of
Reticular formation
loose network of neurons in brain stem, for Level of Consciousness
Definition of
diencephalon
hypothalamus & thalamus (& subthalamus)
Definition of
forebrain
diencephalon
Definition of
Left-side spatial neglect
Inability to process objects in left half of visual field; results from lesion in right-side of parietal association areas
Definition of
occipital lobe (position)
back, above cerebellum
Definition of
Apraxia
Clumsiness; results from lesion in motor association cortex
Definition of
sulci
grooves on cortical surface - increase surface area for cell bodies; separate cortical lobes
Definition of
Wernicke’s aphasia
Non-sensical speech, made-up words, lack of comprehension (fluency, syntax, grammar, word-structure intact); results from lesion in Wernicke’s area
Definition of
Tactile agnosia
Inability to make sense of stimuli; results from lesion in sensory association cortex
Definition of
sclera
outer layer of eyeball, continuous with cornea
Definition of
Conduction aphasia
Difficulty repeating words back (language production & comprehension individually intact); results from lesion in arcuate fasciculus
Definition of
Dorsal signal stream (vision)
spatial vision region
Definition of
Lateral corticospinal tract
controls limbs; opposite side (crosses midline)
Definition of
Ventral signal stream (vision)
visual recognition region
Definition of
Content of Consciousness
What the brain is aware of (perception, emotion, meaning, memories, etc.)
Definition of
grey matter (& location)
neuronal cell bodies in CNS (cortical surface, deep in cortex & middle & edge of spinal cord)
