Gross Brain Flashcards
Name the 3 compartments of the brain
Forebrain, Midbrain, Hindbrain
What does the forebrain include?
Cerebral hemispheres and other deep structures
What does the midbrain include?
Midbrain
What does the hindbrain include?
Pons, Medulla, Cerebellum
What structures make up the brain stem?
Midbrain, pons, medulla
Why do cerebral hemispheres have a lot of folding?
To increase surface area
Gyrus
Ridge of cortical tissue
Sulcus
Groove between gyri
Fissure
Particularly deep sulci
Separates frontal and parietal lobes
Central sulcus
Separates temporal and frontal/parietal lobes
Lateral fissure
Anterior to central sulcus
Precentral gyrus
Posterior to central sulcus
Postcentral gyrus
Separates parietal and occipital lobes
Parieto-occipital sulcus
Gray matter
Area containing neuronal/glial cell bodies and dendrites
White matter
Area containing collections of axons, usually with myelin
Nuclei
Collection of cell bodies with common functions
Cortex
Layers of gray matter over other parts of CNS
Other terms for white matter
Fasciculus, funiculus, lemniscus, tract, peduncle
Houses primary motor areas in frontal lobe
Precentral gyrus
Medial and lateral surfaces of frontal lobe
Voluntary motor behavior and pick movements
Lateral surface of frontal lobe
Houses motor aspects of language
Prefrontal association areas
Emotion, personality, judgement, social inhibitions, concrentration
Modulates emotional aspects of behavior
Cingulate gyrus
Primary somatosensory cortex that processes tactile and proprioceptive info
Postcentral gyrus
Involved in language comprehension in parietal lobe
Inferior parietal lobule
Remainder of parietal cortex function?
Spatial orientation and attention
Map of body parts to the motor and sensory areas of the brain (distortion due to unequal distribution)
Homunculus
Motor and sensory areas of brain on homunculus
Precentral (motor) and postcentral (sensory) gyri
4 functions of temporal lobe
Primary auditory cortex, wernicke’s area, higher order processing of visual information and learning/memory
Wernicke’s area
Language comprehension
Contains primary visual cortex
Calcarine sulcus
What is the limbic lobe important for?
Learning, memory, emotion
Where is the insular lobe?
Deep in the lateral fissure
What is the term for when an area is covered by lobes?
Opercula
Gatekeeper for cortex
Thalamus
Connects limbic system, regulates circadian rhythm, pineal gland
Epithalamus
Hormonal, visceral and autonomic functions
Hypothalamus
Connect cortical areas within the SAME hemisphere
Association fibers
Connect areas in 1 hemisphere to the other
Commissural fibers
Carry info to and from cerebral cortex
Projection fibers
White matter bundle of fibers that travels via corona radiata
Internal capsule
What are the limbs of the internal capsule?
Anterior limb, Genu, Posterior limb, Sublentricular limb, Retrolenticular limb
Basal nuclei are critical for what?
Initiation and control of voluntary movement
Function of cerebellum
Sensory information processing and influences motor neurons
Cerebellum surface made up of transverse ridges of gray matter
Folia