CNS Neuroanatomy Flashcards
Structures in the Hindbrain
Pons + medulla + Cerebellum
Medulla
Part of Hindbrain
Where the 12 cranial nerves originate
Controls vital reflexes
Pons
Part of Hindbrain
Axons from each half of the brain cross to opposite side of spinal cord
Cerebellum
Part of Hindbrain
Movement control + balance
Parts of the Midbrain
Tectum Tagmentum Superior colliculus Inferior colliculus Substantia nigra Cerebral peduncle
Tectum
Part of midbrain
roof (dorsal of midbrain)
Superior + Inferior colliculus
Superior colliculus
Part of midbrain
Vision processing
Inferior colliculus
Part of midbrain
Hearing processing
Substantia nigra
Part of midbrain
Synthesizes dopamine
Parts of the Forebrain
Diencephalon
Telencephalon
Diencephalon
Part of forebrain
Thalamus + Hypothalamus
Telencephalon
Part of forebrain
Everything in forebrain other than thalamus + hypothalamus
Limbic System
Part of telencephalon Hippocampus Hypothalamus Amygdala Olfactory bulb Cingulate gyrus
Hypothalamus
Part of limbic system and diencephalon
Homeostasis regulation
Contains mammillary nuclei + posterior pituitary gland+ anterior pituitary gland + Lateral hypothalamus + Ventral medial hypothalamus
Amygdala
Part of limbic system
Production fo fear and anger behaviours and fear memories
Thalamus
Part of diencephalon
Relay station for all senses except olfaction
Sends output to cortex
Contains lateral geniculate nucleus
Hippocampus
Part of limbic system
Memory center – spatial, contextual and episodic memory and navigation
Damage results in retrograde and anterograde amnesia
Contains dentate gyrus + cornu ammonis + subiculum
Basal ganglia
Made of the caudate nucleus + putamen + globus pallidus + ventral striatum
Used in voluntary motor functions
Damage impairs movement -> Huntington’s + Parkinson’s
Caudate nucleus
Part of basal ganlgia
Important in voluntary movement
Forms dorsal striatum with putamen
Putamen
Part of basal ganglia
Input from sensory and motor areas and projects info to globus pallidus
Reinforcement and motor learning
Forms the dorsal striatum with the caudate nucleus
Globus Pallidus
Part of basal ganglia
Inhibitory output from basal ganglia -> thalamus
Basal Forebrain
Contains nucleus basalis
Pyriform cortex
Olfaction, receives input from olfactory bulbs
Cingulate cortex/gyrus
Generation of emotional responses
Part of limbic system
Motor cortex
Execution of movmemnts
Prefrontal cortex
Part of Frontal lobe
Regulation of cognitive processes – working memory, inhibitory control
Entorhinal cortex
Located in medial temporal lobe
Memory system
Anterior commisure
Part of olfactory tract crosses here
Name the commisures
Corpus callosum, hippocampal commissure, anterior and posterior commissure
Where are the ventricles located
Lateral ventricle: One on each side of forebrain
3rd ventricle: located in the midbrain, connects to 4th in center of medulla
4th ventricle: located in the hindbrain
What are fiber tracts
Pathways of white matter
Optic chiasm
Fiber tract where part of optic nerve crosses here to contralateral hemisphere
Optic Tract
Fiber tract where segment of optic nerve that connects chiasm and lateral geniculate nucleus
Olfactory tract
Fiber tract where transmission of olfactory information from olfactory bulbs -> primary olfactory cortex