3.4-3.6 Flashcards
White matter is composed of
Myelinated axons
Are dorsal root afferent or efferent
Afferent(sensory)
What type of neuron are dorsal root axons
Unipolar neurons
Dorsal root axons synapse with
Dorsal horns of spinal cord
Ventral root axons efferent or afferent
Efferent(motor)
Gray matter is composed of
Cell bodies and unmyelinated axons
What type of neuron is the ventral root axon
Multipolar
What do ventral root axons synapse with
Autonomic- Internal Organs
Somatic- Skeletal Muscle
What is the purpose of the myelencephalon(medulla)
Reticular formation: Arousal+Sleep
What is the purpose of the metencephalon
Reticular formation, pons, cerebellum, sensorimotor
What is the purpose of mesencephalon
Tectum: superior collicull-visual motor + inferior collicull
Tegmentum: division of mesencephalon ventral to the tectum
What is the purpose of the diencephalon
Has the thalamus which is 2 lobes located at the top of the brain stem. The hypothalamus is located below the anterior thalamus
Nuclei of the thalamus that processes visual information
Lateral geniculate nuclei
Nuclei of the thalamus that processes auditory information
Medial geniculate nuclei
Nuclei of the thalamus that processes the somatosensory information
Ventral posterior nuclei
What are fissures
Large furrows in a convoluted cortex
What is a gyri
Ridges between fissures
What are commissures
Connects cerebral hemispheres by a few tracts spanning longitudinal fissure
What is the function of the frontal lobe
Motor function + complex cognitive functions (evaluating patterns of behavior and assessing significance of the behavior of others)
What is the function of the temporal lobe
Hearing + language, complex visual patterns and memory
What is the function of the parietal lobe
Analyzes sensations from the body and precise information location of both objects and our own bodies+directing attention
What is the function of the occipital lobe
Visual
Which structures compose the basal ganglia
Amygdala, striatum, and globus pallidus
Which structures compose the limbic system
Amygdala, fornix, cingulate cortex, septum, hippocampus, and mammillary body
