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CentralNervousSystemKhadraMohamed (Cerebrum (Lobes (Frontal lobe (To think…
CentralNervousSystemKhadraMohamed
Cerebrum
Lobes
Frontal lobe
To think, Plan, and make Deision
Parital lobe
Awareness of objects, sounds, body parts
Temporal lobe
Place of auditroy and olfactory cortex
Occipital lobe
Place of visual cortex
Insula
Gustational cortex
Precentral gyrus
Primary motor cortex, controls voluntary movement
Postcentral gyrus
Primary sensory cortex, general sensory information
Motor speech area (Broca area)
In left hemisphere, produce speech, movement speech
Wernicke area
In the left hemisphere, ables us to understand speech, name things and read words
White matter tracts
Association tract
Carry messages in the same hemisphere, different parts
Commissural tract
Carry massages between two hemispheres
Projection tract
Runs vertically, carries signals different parts of brain
Diencepalon
Epithalamus
Has the pineal gland, regulate secretion of sleep hormone
Thalamus
Where all the sensory information on the way to cortex goes through, except Olfactory
Hypothalamus
Main visceral control center,regulate body temperature
CNS Protaction
Three Meninges
Dura matter
Tough dens fibrous tissue/ the most outer meninge
Arachroid matter
Lis deep to the Dura matter
Pia mater
Layer of delicate connective tissue richly vascularized
Subarachroid spaces
Filed with cerebrospinal fluid
Dural sinuses
Part of dural matter and they filed with blood that is poorly oxegnated
Cerebellum
Functions
Smooth and coordinate body movements and maintain posture
Cerebellar peduncles/ they coordinate communication about movements and connect cerebellum to other brain parts
Superior cerebellar peduncle
connection with midbrain/effernt
Middle Cerebellar peduncle
connect with Pons/ effernt
Inferior cerebellar
Connect with medulla obligate/ equilibrium
Spain Cord
Conus medullaris
Where spinal cord ends and tapers into Conus medullaris
Cauda equina
Collection of nerve roots at the inferior end of vertebral canal
Filum terminale
A long filament of conccetive tissue extends from the conus medullaris
Anterior root
Carries SM and VM
Posterior root
Carries SS and VS
Brain Stem
Midbrain
Has cerebral peduncles
Corpora quadrigemina
Superior colliculi
Visual reflexes
Inferior colliculi
Auditory reflexes
Pons
Composed of Pyramidal Motor tract to spinal cord, also separate from cerebellum by the 4th ventricle
Medulla oblongate
where Cardic center, visomoter center and respiratory center
Has Decussation of Pyramids
Where signal decussate