7/23 Part Two (Structure of Brain, Cranial Nerve Pathways) Flashcards
In an embryo, what are the portions included in these regions?
Forebrain:
Midbrain:
Hindbrain:
Forebrain: cerebrum, diencephalon
Midbrain: midbrain
Hindbrain: cerebellum and pons, medulla oblongata
The cerebrum is responsible for what?
-Conscious movement!! Perception Movement of somatopleure Sensoro-motor integration Emotion Memory Learning
The diencephalon is responsible for what?
-Maintaining balance!!
Homeostasis
Behavioral drives (hunger & thirst)
Coordination of neural & endocrine activities in hypothalamus
Sensory relay and modification in thalamus
Melatonin secretion in pineal gland
The midbrain (mesencephalon) is responsible for what?
Regulating auditory and visual reflexes
In the midbrain, what controls visual reflexes? Auditory reflexes?
Visual: superior colliculi
Auditory: inferior colliculi
The cerebellum is responsible for what?
(unconscious) Control of fine-tune control
Problems with the cerebellum result in what?
Ataxia (lack of order/muscle coordination)
What does the pons connect?
Links cerebellum with midbrain, diencephalon, cerebrum, & spinal cord
The medulla oblongata is responsible for what?
Vital involuntary functions (blood pressure, sleep, breathing, vomiting)
Where is the respiratory rhythmicity center? What does it do?
Medulla oblongata
It sets the pace for respiration
The sensory signals from the respiratory rhythmicity center have to pass through what first? What is the “location” called?
The pons
Apneustic and pneumatic centers for modifying respiration
The pons contains the CN nuclei of…
CN 5
CN 6
CN 7
CN 8
The medulla oblongata contains the CN nuclei of…
CN 8 CN 9 CN 10 CN 11 CN 12
Each hemisphere contains a large what? What separates them?
Lateral ventricle
Septum pellucidum
The ventricle in the diencephalon is called…
the third ventricle
