Intro 2 Neuro Flashcards
Somatic Nervous System
External Environment: conscious sensation (peripheral), striated mm
Autonomic Nervous System
Internal Environment (visceral): sensation (and homeostasis), smooth mm and glands
Neuraxis
transverse section through the center
Horizontal Neuraxis
transverse section perpendicular to the coronal section
Prosencephalon
Cerebrum: telencephalon (cerebral hemispheres) and diencephalon
Mesencephalon
Midbrain
Rhombencephalon
Metencephalon (pons and cerebellum) and Myelencephalon (medulla oblongata)
Spinal Cord begins…
at the base of the skull (Foramen Magnum)= the junction btw the rhombencephalon and spinal cord
Choroid Plexus
vascular toughs= produces CSF- lateral, 3rd, and 4th ventricles
CNS Glia (“glue”) Cells
astrocytes= look like stars oligodendroglia= produce myline (white) microglia= immune in CNS
PNS Glia Cells
neurilemmal cell of Schwann- similar to oligodendroglia
Small Molecule Neurotransmitters
glutamate (E)= CNS usually
GABA (I)= CNS
acetylcholine (Ach)= memory
-E or I based on receptors
Monoamines
dopamine (E)= DO or DA
norepinephrine and epinephrine (E)
serotonin (E)
Neuropeptides
ACTH
substance P=PAIN- co-transmitter (accessory NT)
–a group of nerve cell bodies in the CNS?
Nucleus
–a group of nerve cell bodies in the PNS?
Ganglion
Ipsilateral
axon is on the SAME side as the target
Contralateral
axon is on OPPOSITE side as the target
Bilateral
axon and target are on BOTH sides
Decussation
crossing
Commissure
connects one side to the other
Meninges
dura mater- dural septae
arachnoid- arachnoid trabeculae
pia mater
Lines the skull
adhere to each other (potential space/sinuses)
endosteal layer
meningeal layer
Dural Septae
falx cerebri
tentorium cerebelli- tentorial incisure (tentorial notch)-opening for brain stem
Lateral Fissure btw
temporal and frontal lobes- deep groove
Central Sulcus btw
parietal and frontal lobes
Insular Cortex
portion of the cerebral cortex folded deep within the lateral sulcus (the fissure separating the temporal lobe from the parietal and frontal lobes)
Anterior Commissure
connecting the two cerebral hemispheres across the midline
Corpus Callosum
connects the left and right cerebral hemispheres
Posterior Commissure
crossing the middle line on the dorsal aspect of the upper end of the cerebral aqueduct
% of Blood Flow to Brain
20%
Arachnoid Villus
allow CSF to be resorbed
Increase of inter-cranial pressure will continue to the back of the eye and…
constrict the Optic papilla (disk)
Epidural Hematoma
blood build up btw skull and dura mater
Subdural Hematoma
blood build up btw dura mater and aracnoid mater
Frontal Lobe
- largest
- motor function
Parietal Lobe
- touch
- directs (the driver) of the frontal lobe
Brainstem Arteries
Vertebral –> Basilar
Cerebral Arterial Circle
Basilar –> Posterior Cerebral –> Posterior Communicating –> Internal Carotid –> Middle Cerebral –> Anterior Cerebral –> Anterior Communicating
Aneurysm
hemerage in subarachnoid space
Anterior Cerebral A supplies:
medial and anterior of brain
Posterior Cerebral A supplies:
lateral and posterior of brain?