ANATOMY - Brain Flashcards
What are the three main anatomical divisions of the brain?
Prosencephalon (Forebrain)
Mesencephalon (Midbrain)
Rhombencephalon (Hindbrain)
What are the two anatomical subdivisions of the prosencephalon (forebrain)?
Telencephalon
Diencephalon
Which structures are found within the telencephalon?
Cerebrum
Limbic system
Basal ganglia
Which structures are found within the diencephalon?
Thalamus
Hypothalamus
Pituitary gland
What is the function of the thalamus?
The thalamus is composed of different nuclei that are each involved in relaying sensory and motor signals
Which structure forms the roof of the diencephalon?
Epithalamus
Which gland is contained within the epithalamus?
Pineal gland
Which structures are found within the mesencephalon (midbrain)?
Cerebral peduncles
Rostral colliculus
Caudal colliculus
What is the function of the rostral colliculus?
Rostral colliculus relays visual information
What is the function of the caudal colliculus?
Caudal colliculus relays auditory information
What are the two anatomical subdivisions of the rhombencephalon (hindbrain)?
Metencephalon
Myelencephalon
Which structures are found within the metencephalon?
Pons
Cerebellum
Which structure is found within the myelencephalon?
Medulla oblongata
What are the functions of the cerebrum?
Cognition and thought processing
How does the cerebrum vary between species?
Higher mammals have a cerebrum with more gyri and sulci which enhances the surface area and increases the potential for neural networks
Which structure divides the cerebrum into left and right cerebral hemispheres?
Longitudinal fissure
What are the five cerebral lobes that divide each cerebral hemisphere?
Frontal lobe
Parietal lobe
Temporal lobe
Occipital lobe
Olfactory lobe (in some species)
Which structure seperates the frontal lobe from the parietal lobe?
Cruciate sulcus
Which structure seperates the frontal and parietal lobes from the temporal lobe?
Lateral sulcus
What are the functions of the frontal lobe?
Behaviour
Speech
Movement
Problem solving
What are the functions of the parietal lobe?
Associated with movement and orientation
Involved in perceiving sensory input
What are the functions of the temporal lobe?
Processes sound, vestibular sensations and olfaction
What is the main function of the occipital lobe?
Processes visual information
What is the main function of the olfactory lobe?
Processing olfactory information
Which structure connects the two lobes of the thalamus?
Interthalamic adhesion
What are the four main white matter regions of the brain?
Corpus callosum
Internal capsule
Cerebellar peduncles
Corona radiata
What is the function of the corpus callosum?
Corpus callosum is white matter connecting the left and right cerebral hemispheres
What is the function of the internal capsule?
Internal capsule is white matter connecting the cerebral hemispheres to the brainstem
What is the function of the peduncles of the cerebellum?
Peduncles of the cerebellum are white matter connecting the cerebellum to the pons and medulla oblongata of the brainstem
What is the function of the corona radiata?
Corona radiata is a continuation of the internal capsule which relays information to and from the cerebrum
What are deep nuclei?
Deep nuclei are central masses of grey matter
List two deep nuclei structures
Basal ganglia
Hippocampus
What is the meninges?
Meninges is a protective membrane covering the brain and the spinal cord
What are the three meningeal layers?
Dura mater
Arachnoid mater
Pia mater
What is contained within the sub-arachnoid space?
Cerebrospinal fluid (CSF)
What are the two layers of the dura in the cranium?
Outer periosteal dura attached to the internal surface of the skull bones and the inner meningeal dura
In which regions are the outer periosteal and inner meningeal layers of the dura mater not fused?
The outer periosteal and inner meningeal layers of the dura mater are not fused at the venous sinuses
What are dural folds?
Dural folds are invaginations of the inner meningeal dura which separate the cranium into compartments
What is the falx cerebri?
Falx cerebri is a dural fold which projects towards the longitudinal fissure and separates the left and right cerebral hemispheres
What is the tentorium cerebelli?
Tentorium cerebelli is a dural fold which separates the cerebrum and cerebellum
What is the diaphragma sellae?
Diaphragma sellae is a dural fold which wraps around the stalk of the pituitary gland
What is the cisterna magna?
Cisterna magna is an enlargement of the sub-arachnoid space filled with cerebrospinal fluid (CSF)
What is the clinical significance of the cisterna magna?
The cisterna magna is used for cerebrospinal fluid (CSF) collection
Why is the brain divided into rostral and caudal fossae?
Rostral and caudal fossae are clinical divisions used to localise anatomy, diagnostic imaging and pathology
Which structures are contained within the rostral fossa?
Prosencephalon (Forebrain)
Part of the mesencephalon (Midbrain)
Cranial nerves I and II
Lateral ventricle
Third ventricle
What is the caudal border of the rostral fossa?
Tentorium cerebelli
Which structures are contained within the caudal fossa?
Part of the mesencephalon (Midbrain)
Rhombencephalon (Hindbrain)
Fourth ventricle
What is the caudal border of the caudal fossa?
Foramen magnum
Identify these structures on the dorsal surface of the brain
Identify the following structures on this dissected dorsal surface of the brain
Identify the following structures on this sagittal section of the brain