gray & white matter
What is the gross appearance of cells in the brain that support the glia cells and unmyelinated fibers?
gray matter
What lobe in the cerebrum aids in visuals?
Occipital lobe
cognition, language, and memory
Central Nervous System
The corticobulbar tract conducts impulses from the brain to the
cranial nerves
What makes gray matter gray?
Absence of myelin
Where is the hypothalamus located in regard to the thalamus?
inferior
What does the limbic lobe regulate?
Motivational & emtional states
The corticospinal tract conducts impulses from the brain to the
spinal cord
What length of axonal projections descends from the corticobulbar tract?
short axonal projections
What is made of axonal fibers that form tracts and carry sensory or motor information
White Matter
Which hemisphere is usually dominant for speech and language?
Left hemisphere
Which part of the cerebrum functions as the regulator for motor movements and muscle tone?
The basal ganglia
What length of axonal projections descends from the corticospinal tract?
What function does the corticobulbar tract serve?
What makes white matter white?
The white appearance of the myelin substance surrounding the axons.
Which lobe is rostral to the central sulcus and dorsal to the lateral fissure?
It occupies 1/3 of the hemisphere.
frontal lobe
What is one function of the thalamus?
possible answers:
- channels sensorimotor info to the cortex
- participates in cortex-mediated functions
-regulates crude awareness of sensation
The corticospinal tract is involved in the voluntary movement of muscles of the body. true or false
true
What type of tract is the corticobulbar tract?
a two-neuron path
How many layers are there in the cerebral gray matter?
6
The cerebrum is 100-115 mm thick layer of neurons?
true or false
false. 3-5mm
What is one function of the hypothalamus?
It regulates...?
possible answers:
- body temperature
- food intake
- water balance
-hormonal secretions
- emotional behavior
- sexual responses
What does the corticospinal tract regulate?
Motor control of skeletal muscles
Which cranial nerves do corticobulbar tracts carry upper motor neurons
trigeminal, facial, glossopharyngeal, vagus, accessory, and hypoglossal nerves