NERVOUS System Flashcards
Primary Brain Vesicles ( PMR)
Prosencephalon
Mesencephalon
Rhombencephalon
Prosencephalon
Telencephalon
Diencephalon
cerebrum & basal ganglion
Telencephalon
retina, thalamus & hypothalamus
Diencephalon
midbrain, superior & imferior colliculi
Mesencephalon
Rhombencephalon
Metencephalon
Myelencephalon
Metencephalon
Pons & cerebellu,
myelencephalon
Medulla Oblongata
largest portion of the brain covered by gray etter & white matter. Awareness center of the brain
Cerebrum
major output of the cerebrum for information
Pyramidal Cells
elevated ridges
GYRI
small groove dividing the gyri
SUlCi
deep groovws dividing the lobes of the brain
FISSURES
divides the FRONTAL & PARIETAL
CENTRAL SULCUS ( FISSURES OF ROLANDO)
divides TEMPORAL & PARIETAL
LATERAL CEREBRAL FISSURE / Sylvian Fissure
problem solving, judgement & Motor
Frontal
eft side production of speech
Brocaβs Area
handwriting , body position & sensory
Parietal Lobe
odontalgia
Post- Central Gyrus
storage of memory & hearing
Temporal Lobe
left side for comprehension of SPEECH
Wernickeβs Area
anterior area for emotions, motivations & FEAR
Amygdala
establishing long term memory & limbic system
Hippocampus
hypothalamus function
- Endocrine Center
- Water regulation
- Body temp.
it produces Vasopressin hormone / ADH
SUPRA-OPTIC NUCLEUS
it produces OXYTOCIN
PARAVENTRICULAR NUCLEUS
satiety center
VMPO - ventro medial pre optic nucleus
sleep center
Ventro lateral pre optic nucleus
STAGES of SLEEP
- Non-Rem I
- Non- Rem II
- Non- Rem III
- REM
function of Thalmamus
arousal
focuses attention
visual sensation
Lateral Geniculate nuclei
for facial sensation & pain
VPM- ventral posterior medial
to mediate motor function
Ventral Anterior
for proprioception, touch , vibration & pressure
VPL
the most posterior part of the brain
posture & coordination
Cerebellum ( Little Brain)
for 7 that controls salivation & glandular secretion
Superior Salivatory
for IX that controls parotid gland
inferior salivatory
for 9 & 10 during swallowing
Nucleus Ambiguous
7, 9, 10 taste sensation
Nucleus Of the Solitary Tract
awakening center
RAS
rate of respiration, hearing , taste & micturition
Pons Varolli
most inferior part of the brain for blood pressure, breath, swallow, cough, vomit & blinking reflex
** respiratory center of the brain
Medulla Oblongata
outermost & thickest
Dura Mater
CSF located
Subarachnoid space. produce choroid plexus of the brain
PATHWAYS of CSF
- Lateral Ventricle
- Foramen Monroe
3rd ventricle
Aqueduct of Sylvius
4th ventricle
Foramen Luschka (lateral)
Foramen Magendie (medial)
CSF
Production site
Produced by
Location
Choroid plexus of rhe ventricle of the brain
Ependymal cells
Subarachnoid space
PARTS of NEURONS
- Dendrites
- Body (Soma)
- Axon
it receives the information from other neurons
Dendrites
are the ribosomal representation of the neurons
Nissl Bodies
it controls the firing of the neurons
Axon hillocks
it carries the information away from the body
Axon
fatty substance around the axon for GOOD CONDUCTION
Myelin Sheath
are the gap of myelin sheath
Nodes of Ranvier
hair like end part of the axon
Axon terminal
most abundant in the body
Ach
1st to anesthesia
slow abundant
small unmyelinared
Unmyelinated
faster cinduction
Myelin
protein synthesis
Ribosomes
covering protection of neuron
Epineural Sheath
damage of Epineural Sheath
Paresthesia
Types of Nerve Fibers
Group A
Alpha
Beta
Gamma
Delta
Group B
Group C
myelinated nerve & fastest conduction occurs
Group A (large)
somatic motor
Alpha
touch & pressure
Beta
sharp pain , cold & touch
Delta
muscle spindle apparatus
Gamma
mostly founf in pre ganglionic ANS
Group B
unmyelinate slow dull pain
Group C
βΌοΈβΌοΈβΌοΈβΌοΈRememberβΌοΈβΌοΈ
1. nerve impulse in myelinated (120m/sec)
2. unmyelinated (1.2m/sec)
3. present in the pulp
1.Saltatory
2. Continuous
3. A delta fiber & C fiber
to support tghe neurons & they can regenerate unlike neurons
Neuroglias
Types of Neuroglias : SEASO
Satellite
Ependymal
Astrocytes
Schwann
Oligodendrocytes
maintains homeostasis
Satellite
produces in CSF
Ependymal cells
support the blood supply of the brain
Astrocytes
produces myelin sheath in the PNS
Schwann (Neurilemmocyte)
CNS
Oligodendrocytes
AMPS
Anterior Motor
Posterior Sensory
excessive CSF in the Brain
Hydrocephalos
spinal cord increase CSF
Spina Bifida
no O2 in the Brain
Asphyxation
πππSPINAL TRACTS
1. for pain & temp.
2.touch & pressure
3, movement of head
4. equilibrium
5. muscle tone & sweat gland
- Lateral Spinothalamic tract
- Ant. Spinothalamic tract
3, Tectospinal - Vestibulospinal
- Reticulospinal
Vertebrae
31- typical
2 - atypical
a fibrocartilage found between 2 vertebrae
intervertebral disc
articulating part of vertebrae
spinous process
lateral projections for attachment of muscle & articulation of RIBS
Transverse process
for passageway of spinal nerves
Vertebral Foramen
to support the head
Cervical 7
conn. to the Occipital Bone via Ligamentum Nuchae
NO spinous process
C1 - Atlas
Ligamentum Nuchae runs from
C1 - C6
it contains DENS or Odontoid Process (toothlike) epistopheus
C2 Axis
enters Vertrebral Artery via Transverse Foramen
C6
Transverse Foramen is present only
C1- C6
most prominent cervical
C7