Page 346 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Cortical layers I–VI (multiple view of a single-cortex column)
Columns I
II
III
IV
V
VI
Surface
1 2 3 4
I Unspecific
thalamo-
cortical
II fibers
Pyra- Commissural
midal fibers Cerebral Cortex EEG
III cell Stellate
Axon cell Association
fibers
Specific
IV Stellate thalamo-
Principal cortical
dendrite cell fibers
Pyramidal Associa-
Com-
V cell tion missural Plate 12.12
fibers fibers (After Szentágothai and Birbaumer/Schmidt)
Axon
colla-
VI teral
Corticocortical Thalamic Corticobulbar and
Neurons
connections afferents spinal efferents
B. Recording the electroencephalogram (EEG)
Awake, resting
1 Eyes closed Eyes open Eyes closed
1
EEG
unit
Reference
electrode 7
7 α β α
“Desynchronization”
C. EEG curves D. Stages of sleep, REM sleep
Frequency EEG (See also text on next page)
Normal 10 20 30 40 min
α 8–13Hz Awake α/β
β 100µV 14–30Hz A α/ϑ REM sleep
ϑ 4–7Hz B(1) ϑ
1s REM ϑ
δ 0.5–3Hz C(2) ϑ
Abnormal
Paroxysmal Stage of sleep D(3) δ
spikes
Paroxysmal E(4) δ c) ´
waves
3Hz spikes (After Iovanovi` 333
and waves 0 1 2 3 4 5 6
Duration of sleep (hrs)
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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