Ch. 13 Brain & Cranial Nerves Flashcards
4 Major Portions of the Brain
- Cerebrum
- Cerebellum
- Diencephalon
- BrainStem
Ridges of outer surface of brain
Gyri
Depressions of outer surface of brain
Sulci
Deep Sulci of outer surface of brain
Fissures
Another term for Anterior
Rostral
Another term for rostral
Anterior
Another term for posterior
Caudal
_______ Matter: Made of neuron cell bodies, dendrites, and Unmyelinated axons.
Gray
What type of brain matter contains unmyelinated axons?
Grey Matter
Gray matter surface of the cerebrum
Cerebral Cortex
Regions of grey matter (clusters of cell bodies) found deep in the cerebrum
Cerebral Nuclei
_________ Matter: Consists of myelinated axons
White
Connective tissue membrane surrounding the CNS
Meninges
This meninges is the most superficial, termed “tough mother”
Dura Mater
Dura Mater is made of what type of CT
Dense irregular
This meninges is made of web like collagen and elastic fibers
Arachnoid Mater
This meninges is bound tightly to the brain
Pia Mater
Pia mater is made of what type of CT
Areolar CT
The epidural and subdural spaces between Meninges contains ___________
Blood Vessels
The subarachnoid space contains ___________
CSF (Cerebrospinal Fluid)
Cavities filled with CSF and lined with Ependymal Cells.
Ventricles
Clear, colorless liquid surrounding CNS.
Provides buoyancy, cushioning, and stable chemical environment.
Cerebrospinal Fluid (CSF)
The choroid plexus forms….
CSF
In the Blood Brain Barrier, endothelial cells are connected by many ______ Junctions.
Tight
In the Blood Brain Barrier, specialized capillaries are wrapped by ______________ feet (Astrocyte Extensions)
Perivascular
The BBB functions to…
- _________ the substances entering brain’s interstitial fluid
- Helps prevent neuron exposure to __________ substances (ex. drugs, waste)
- Regulate
- Harmful
Origin of all complex intellectual functions
Cerebrum
Made up of two large hemispheres on superior aspect of the brain
Cerebrum
The _________ is the center of…
Intelligence and reasoning, memory, judgement, voluntary motor activities.
Cerebrum
The largest white matter tract connecting the 2 hemispheres of the Cerebrum.
Corpus callosum
In the cerebrum, connections with the body are normally __________.
crossed
In the Cerebrum, the left hemisphere receives sensory signals from the _______ side of the body and sends motor signals to the _______ side of the body.
Right & Right
Term recognizing that a few higher-order functions are primarily controlled by one side of the brain
Lateralization
Speech is frequently located in _______ cerebral hemisphere.
Left
The Primary Motor Cortex is part of what lobe of the cerebrum?
Frontal
The primary motor cortex is located in the ____________ gyrus, of the frontal lobe.
Precentral
This functional area of the cerebrum controls skeletal muscle activity on opposite sides of the body.
Primary motor cortex
Motor_____________; a map of controlled body regions whose proportions reflect the amount of cortex dedicated to each region
Homunculus
This functional area of the cerebrum controls movements for vocalization.
Motor speech Area // Broca Area
This functional area of the cerebrum coordinates learned, skilled activites
Premotor Cortex
Broca’s area (Motor speech area) is found in what lobe of the cerebrum?
Frontal
Premotor Cortex is found in what lobe of the cerebrum?
Frontal
The Somatic Motor Association Area is also known as the…
Premotor Cortex
This functional area of the cerebrum receives somatic sensory information from… Proprioceptors, touch, pressure, pain, temp. receptors.
Primary Somatosensory Cortex
This functional area of the cerebrum integrates touch information allowing for us to identify objects by feel
Somatosensory association area
The Primary Somatosensory cortex is found in what lobe of the cerebrum?
Parietal
The Somatosensory Association Area is found in what lobe of the Cerebrum?
Parietal
Sensory ________: Distorted proportions reflect the amount of sensory information collected from the region. Large regions for lips, fingers, genitals.
Homunculus
This functional area of the cerebrum integrates color, form, and allows us to identify things from memory. Serves as visual association area.
Primary visual cortex.
The Primary Visual cortex is located in what lobe of the Cerebrum?
Occipital
This functional area of the cerebrum is the auditory association area, interprets sounds, stores and retrieves memories of sounds.
Primary Auditory cortex