Flashcards in Chapter 13 Deck (105)
Brain stem includes
Medulla oblongata, pons, midbrain
Flat plate of ectodermal tissue on dorsal surface of embryo
Rod shaped, influences neural plate in embryo
Lateral sides of neural plate elevate to become waves
Center of the neural plate, the neural crest is the top of the fold
Neural crests fuse together to create the neural tube. Becomes the brain and spinal cord.
Neural crest cells
Separate from neural crests and create sensory, autonomic and enteric neurons
Forebrain, hindbrain, midbrain
Pouches that develop in embryo brain
Embryo- becomes cerebrum and diencephalon
Midbrain of embryo
Stays single unit, mesencephalon
Hindbrain of embryo
Divides into the metencephalon becoming pons and cerebellum
From hindbrain- becomes medulla oblongata
Most inferior part of brainstem. Vital reflexes: heart rate, blood vessel diameter, respiration, swallowing, vomiting, hiccuping, coughing, sneezing
Medulla oblongata. Prominent enlargements
Medulla oblongata. Oval structures protrude anterior surface. Balance, coordination, modulation of sound
Cranial nerves of medulla oblongata
V trigeminal, VII facial, IX glossopharyngeal, X vagus, XI accessory, XII hypoglossal
Superior to medulla oblongata. Has ascending and descending tracts.
Pons. Relays information from cerebrum to cerebellum. Sleep center, REM, respiratory
Midbrain cranial nerves
Smallest region. III oculomotor, IV trochlear, V trigeminal
Pons cranial nerves
V trigeminal, VI abducens, VII facial, VIII vestibulocochlear
Roof of midbrain.
Four nuclei mounds on tectum
Each mound that makes up corpora quadrigemina.
Pair of colliculus. Receive sensory input from visual, auditory, tactile, reflex movements of head, and cerebrum
Pair of colliculus. Hearing, auditory pathway in CNS
Midbrain. Ascending tracts
Midbrain, tegmentum. Unconscious regulation and coordination.
Midbrain, ventral to tegmentum. Descending tracts.
Midbrain, black substance between tegmentum and cerebral peduncles. Muscle tone and coordination