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71 Cards in this Set

  • Front
  • Back
Meninges
protects the brain and spinal cord
3 layers of the meninges:
dura mater, arachnoid mater (subarachnoid space), & pia mater
gyrus:
bumpy surface of brain
sulcus:
dark areas
right and left hemispheres separated by:
longitudinal cerebral fissure
5 cerebral lobes:
frontal, parietal, temporal, occipital, insular
2 major sulci?
Lateral sulcus (Fissure of Sylvius), central sulcus
Frontal lobe divisions:
primary motor, premotor, lateral prefrontal, & ventromedial prefrontal cortex
Parietal lobe:
primary sensory cortex & association areas (angular gyrus, supramarginal gyrus)
Temporal lobe:
superior, middle & inferior temporal gyri, Heschel's gyrus, Wernicke's area
Insular lobe is located in:
the floor of the lateral sulcus
Parahyppocampal gyrus is locate in:
the ventral surface of the brain
"Limbic lobe" includes:
parahyppocampal & cingulate gyri
Two hemispheres are interconnected by:
corpus callosum (largest structure in brain) & anterior and posterior commissures.
Broadmann’s areas (BA) related to cognition, communication & related functions:
Primary auditory area (Heschel’s gyrus): BA 41, & 42
Auditory association area (Wernicke’s) BA 22
Primary sensory area: BAs 1,2, & 3
Supramarginal gyrus (BA 40)
Angular gyrus: BA 39
Primary motor cortex: BA 4
Motor speech area: BA 44,
Eye movement: BA 8
Primary visual area: BA 17
Visual association areas: BAs 18 & 19
Left hemisphere functions:
letters, words, language-related sounds, complex voluntary movement, verbal memory, speech, reading, writing, arithmetic
Right hemisphere functions:
Complex geometric patterns (faces), nonlanguage environmental sounds (music), tactile recognition of complex patterns (Braille), movements in spatial patterns, nonverbal memory, prosody, geometry, sense of direction, mental rotation of shapes.
Broadmann’s areas (BA) related to cognition, communication & related functions:
Primary auditory area (Heschel’s gyrus): BA 41, & 42
Auditory association area (Wernicke’s) BA 22
Primary sensory area: BAs 1,2, & 3
Supramarginal gyrus (BA 40)
Angular gyrus: BA 39
Primary motor cortex: BA 4
Motor speech area: BA 44,
Eye movement: BA 8
Primary visual area: BA 17
Visual association areas: BAs 18 & 19
Left hemisphere functions:
letters, words, language-related sounds, complex voluntary movement, verbal memory, speech, reading, writing, arithmetic
Origin of the cerebral vasculature:
arterial branches from the arch of aorta & subclavian arteries are the major source.
Right hemisphere functions:
Complex geometric patterns (faces), nonlanguage environmental sounds (music), tactile recognition of complex patterns (Braille), movements in spatial patterns, nonverbal memory, prosody, geometry, sense of direction, mental rotation of shapes.
Explain cerebrovascular system.
Anteriorly, the carotid systen ascends through the neck to the skull. After entering the cranial vault, the internal carotid bifurcates to form middle and anterior cerebral arteries. Posteriorly, the vertebral system reach the foramen magnum through transverse processes of the vertebrae. After entering cranial vault the vertebrals fuse to form the basilar artery. Basilar artery traverses the long axis of the brain stem and subsequently bifurcates to form posterior cerebral arteries. Middle cerebral artery is language artery.
Origin of the cerebral vasculature:
arterial branches from the arch of aorta & subclavian arteries are the major source.
Corpus Striatum:
comprises the striatum (caudate & putamen) & pallidum (glubus pallidus).
Explain cerebrovascular system.
Anteriorly, the carotid systen ascends through the neck to the skull. After entering the cranial vault, the internal carotid bifurcates to form middle and anterior cerebral arteries. Posteriorly, the vertebral system reach the foramen magnum through transverse processes of the vertebrae. After entering cranial vault the vertebrals fuse to form the basilar artery. Basilar artery traverses the long axis of the brain stem and subsequently bifurcates to form posterior cerebral arteries. Middle cerebral artery is language artery.
basal ganglia:
corpus striatum, subthalamic nucleus & substantia nigra.
Corpus Striatum:
comprises the striatum (caudate & putamen) & pallidum (glubus pallidus).
Broadmann’s areas (BA) related to cognition, communication & related functions:
Primary auditory area (Heschel’s gyrus): BA 41, & 42
Auditory association area (Wernicke’s) BA 22
Primary sensory area: BAs 1,2, & 3
Supramarginal gyrus (BA 40)
Angular gyrus: BA 39
Primary motor cortex: BA 4
Motor speech area: BA 44,
Eye movement: BA 8
Primary visual area: BA 17
Visual association areas: BAs 18 & 19
Basal Ganglia is involved in:
memory, emotion and other cognitive functions.
basal ganglia:
corpus striatum, subthalamic nucleus & substantia nigra.
Basal ganglia is also called:
extrapyramidal system
Left hemisphere functions:
letters, words, language-related sounds, complex voluntary movement, verbal memory, speech, reading, writing, arithmetic
Basal Ganglia is involved in:
memory, emotion and other cognitive functions.
Striatum contains:
Caudate Nucleus & Globus Pallidus
Basal ganglia is also called:
extrapyramidal system
Right hemisphere functions:
Complex geometric patterns (faces), nonlanguage environmental sounds (music), tactile recognition of complex patterns (Braille), movements in spatial patterns, nonverbal memory, prosody, geometry, sense of direction, mental rotation of shapes.
Origin of the cerebral vasculature:
arterial branches from the arch of aorta & subclavian arteries are the major source.
Striatum contains:
Caudate Nucleus & Globus Pallidus
Explain cerebrovascular system.
Anteriorly, the carotid systen ascends through the neck to the skull. After entering the cranial vault, the internal carotid bifurcates to form middle and anterior cerebral arteries. Posteriorly, the vertebral system reach the foramen magnum through transverse processes of the vertebrae. After entering cranial vault the vertebrals fuse to form the basilar artery. Basilar artery traverses the long axis of the brain stem and subsequently bifurcates to form posterior cerebral arteries. Middle cerebral artery is language artery.
Corpus Striatum:
comprises the striatum (caudate & putamen) & pallidum (glubus pallidus).
basal ganglia:
corpus striatum, subthalamic nucleus & substantia nigra.
Basal Ganglia is involved in:
memory, emotion and other cognitive functions.
Basal ganglia is also called:
extrapyramidal system
Striatum contains:
Caudate Nucleus & Globus Pallidus
Lentiform Nucleus contains:
Putamen & Globus Pallidus
Cells that are deficient in patients with Parkinson's:
Neurotransmitters: acetylcholine, dopamine & gamma-aminobutyric acid (GABA)
What does the Basal Ganglia Controlled Circuits do?
maintains normal posture & static muscle contraction, regulates amplitude, velocity, & initiation of movements.
Orientation of movement in space & learning new movements.
What is the Diencephalon?
Central core of the cerebrum, almost entirely surrounded by cerebral hemispheres. Third ventricle divides diencephalon into symmetrical halves.
Components of diencephalon:
thalamus, sub-thalamus epithalamus, & hypothalamus.
Thalamus, epithalamus & hypothalamus form?
the walls and floor of third ventricle.
Thalamus is located:
medial to the basal ganglia structures.
Thalamus is:
egg-shaped collection of nuclei located above the brain stem. All sensory pathways, except olfactory, terminate in thalamus. It maintains cortical activity that influences arousal and attention. Perception of crude aspects of pain, temperature, and touch, but not accurate localization.
Impairment of thalamus can result in:
language and speech impairment and olfactory hallucination.
Lesion of left lateral thalamic lesion results in:
stuttering
mediodorsal nucleus:
connected with limbic system & frontal lobes
placing lesion in mediodorsal nuclei will ameliorate:
severe anxiety states
Korsakoff's syndrome is:
(amnesia) disorder of memory: lesion in mediodorsal nucleus.
Hypothalamus is located:
inferior and anterior to thalamus.
Functions of hypothalamus:
maintains homeostasis (maintaining body temp, water intake, excretion, blood pressure), eating, reproductive and defensive behaviors, emotional expression of fear, rage, pleasure, regulation of circadian rhythms.
Lesion of subthalamic nucleus results in:
hemiballismus (sudden, involuntary movements)
Epithalamus?
help regulate circadian rhythms, influences secretions of pituitary gland, adrenals & parathyroid.
Brain stem:
includes midbrain, pons & medulla oblongata. Connects spinal cord with forebrain. Located between forebrain and spinal cord.
Function of brain stem:
serves as conduit for ascending and descending tracts connecting spinal cord to different parts of the brain.
Brain stem controls:
respiration and cardio-vascular system, also associated with the control of consciousness. Contains important nuclei for cranial nerves 3-12.
Medulla oblongata associated with cranial nerves:
9, 10, 11, 12
Pons:
a bridge between midbrain and medulla oblongata. transverse fibers that converge to form middle cerebellar peduncle. Trigeminal nerve on anterolateral surface.
Cerebellum:
is connected to brainstem through 3 fiber tracts.
Cerebellum (physical attributes):
a surface layer of gray matter, medullary center of white matter, 4 pairs of central nuclei in the center: fastigial, globose, emboliform & dentate.
(Cerebellum) Paleocerebellum-
the second oldest part of cerebellum. Regulates posture.
(Cerebellum) Neocerebellum-
regulates co-ordination (synergy: smoothness) of muscle control.
Function of cerebellum:
voluntary movements, maintains equilibrium, predicts future positions of moving parts of the body, controls voluntary and involuntary postural movements, makes special contribution to synergy of muscle action, especially in learned activities that require precision.