Week 5 Flashcards
Get quized on brain area table
What does the cerebellum
balance and coordination of skeletal muscle and movement
State the order of the brain stem
Medulla lowest -> pons -> midbrain
State the main function of the major functional areas of the cerebral cortex
Frontal - motor
Parietal - somatosensory
Occipital - vison
Temporal - hearing
What is the white matter of the spinal cord made up of
myelinated axons
Where and why are their enlargements at the cervical and lumbar region
Cervical enlargement: (C4) to (T1). Nerves to and from the upper limbs arise from the cervical enlargement.
Lumbar enlargement- (T9- T12). Nerves to and from the lower limbs arise from the lumbar enlargement.
Where does the spinal cord originate and terminate
Starts at medulla oblongata - extends to second lumbar vertebra
Why are their enlargements at the cervical and lumbar region?
More cell bodies present in grey matter - more information enters and exits these areas of the spinal cord
Where is the locations of cell bodies for GSA, GSE, GVA and GVE
GSA - dorsal root ganglion
GVA - dorsal root ganglion?
GSE - ventral horn
GVE - lateral horn
Where do dorsal and ventral ramus serve
Dorsal - deep muscles of the back
Ventral - upper and lower limbs, lateral and anterior surfaces
Talk thru the spinothalamic anterolateral pathway
First order neuron - synapse in dorsal root ganglion of spinal cord
Decusates - crosses over here
Second order neuron - Synapse at thalamus - ascends in lateral white matter
Third order neuron - synapse at primary somatosensory area
Information for pain, temp and itch
Talk thru dorsal column medial lemniscus pathway
Info for touch, pressure and vibration
First order - synapse at medulla oblongata - decussates here
Second order - synapse at thalamus
Third order - synapse at primary somatosensory area
Dorsal column of white matter
Talk thru descending corticospinal pathway
Motor info to effector
Start in primary motor area and decussates in medulla oblongata
Upper motor neuron - synapse at spinal cord
Lower motor neuron - synapse at skeletal muscle
Travels down ventral and lateral columns of white matter
State the three meninge layers with function start from superficial to deep
Dura matter - superficial, thick strong dense irregular CT
SUBDURAL SPACE - INTERSTITAL FLUID
Arachnoid matter - middle, thin, avascular, spider web arrangement, collagen and elastic fibres
SUBARACNOID SPACE - cerebro fluid
Pia matter - Inner, thin connective tissue thin squamousy cells
