Immediately below the pyramids, the axons
s to the opposite side of the
CNS. Thus, the left cerebral hemisphere commands the
side of the body, and
the right cerebral hemisphere controls the
side of body.
25.
The extrapyramidal motor pathways are concerned with
c (n
l)
control of body parts. This particularly includes patterned, sequential
ts or
a
ns. The cerebellum plays a major role in extrapyramidal pathways. The
cerebellum is the major center for c
ing the patterned sequential actions of the
body, such as w
ing.
26.
The human nervous system can be thought of as a series of
ps or
ls.
Each level is more
x than the level just below. No level is completely over
d
by upper levels, but each level is c
d or g
d by the next upper level as it
functions.
The simplest and lowest level of control is the
arc. Producing a wider
reaction to a stimulus are
d reflexes.
27.
Nuclei in the medulla of the hindbrainstem control the
l activities of the
body, such as r
n,
t
t, etc.
The reticular formation of the brainstem has a f
tory area and an i
tory
area. This control area produces
p or
ness.
The thalamus is a group of nuclei found together in the
stem. The
thalamus is the major
y center of s
y inputs.
The hypothalamus is a higher control center for
l activities of the body.
28.
The cerebellum is the primary center for the i
tion and
l of patterned,
sequential
ns of the body.
29.
In humans, the highest level of control is localized in the
. Localized
at this level are c
s sensation and
nal motor activity.
The visceral level within the cerebrum is concerned with
activities of
the body, as related to f
t-or-f
t,
r, and other emotions.
The second level of the cerebrum is concerned with st
ed patterns of
muscle activity.
MD0007
12-30