Gray Matter & White Matter
What are gray matter cells located?
Cerebral Cortex (CH 1 PG 12)
The brain consists of what three major structures?
Cerebrum, brainstem, and cerebellum (CH 1 PG 14)
What regulates motor movements and muscle tone?
Basal ganglia (CH 1 PG 14)
CNS ( CH 1 PPT. slide #23)
Corticobulbar tract carries ____ motor neuron input to cranial nerves.
Upper
What is the gross appearance of brain cells which constitution of nerve cells, supporting glial cells, and mainly unmyelinated fibers?
Gray Matter (CH 1 PG 12)
What language area is located in the cerebral cortex of the cerebrum?
Brodmann's areas (CH 1 PPT. Slide 30)
What lobe is made up of subcortical brain structures that regulates your motivational and emotional state?
Limbic Lobe
There are two corticospinal tracts: _____ and _____ corticospinal tracts.
Lateral & Anterior (CH 13 PG 289)
Where does this tract originate?
Precentral gyrus ( PPT CH 2 Slide #23)
What is made os axonal piers that form tracts and carry sensory or motor information from one side of the brain to the other?
White Matter (CH 1 PG 12)
What are the three landmarks of the cerebrum?
Longitudinal fissure, central sulcus, and lateral sulcus? (CH 1 PPT slide #29)
The _________ hemisphere serves functions such as cognition, language, and memory.
Cerebral hemisphere
Where do the lateral corticospinal tracts cross?
At the midline of the medulla (CH 13 PG 289)
What is another name for this tract?
Cortinuclear tract ( CH 16 Pg 351).
Why is the white matter white?
Because of the white appearance of the myelin substance surrounding many of the axons (CH 1 PG 12)
What serves as a control center for various vital metabolic activities such as, body temperature, body rhythm control, and water and food balance?
Hypothalamus (CH 1 PG 14)
What houses the thalamus and hypothalamus within the cerebral cortex?
Diencephalon
Where do corticospinal tracts come from?
Motor Cortex (CH 13 PG 289).
The corticobulbar fibers exit at the appropriate level of the brain stem to _____ on the lower motor neurons of the cranial nerves
synapse ( Ch 1&2 PPT. slide 23)
Why do the cells appear gray?
Due to the absence of myelin ( CH 1 PG 12)
The cerebral cortex is made up of ____ molecular levels.
6 (CH 1 PPT. slide #32)
What structure within the cerebral cortex channels sensorimotor information to the cortex?
Thalamus (CH 1 PG 15)
What can occur is a lesion attaches to fibers of this tract?
It can cause profound weakness and loss of all individual manipulation skills. (CH 13 PG 290)
this tract passes through the _____, _______, ______ and then terminates.
midbrain, pons, medulla