Brain regions Flashcards
Medulla Oblongata origin
embryonic myelencephalon
Medulla Oblongata
-begins at magnum foramen of skull
-continuous with spinal cord
-all nerve fibers pass through from spinal cord to brain
Medulla Oblongata Functions
- vasomotor
2.cardiac - respiratory
- reflex center
-coughing, sneezing, gagging, ect
Medulla Cranial Nerves
VIII, IX, X, XII
Pons
anterior bulge in brainstem
Pons origin
develops from metencephalon
Pons Functions
Sensory roles: hearing, equilibrium, taste, facial sensations
Motor roles: eye movement, facial expressions, chewing, swallowing, urination, and secretion of saliva and tears
Pons Cranial Nerves
V, VI, VII, VIII
Mid Brain
-Connects forebrain to hindbrain
-Tectum, Corpora Quadrigemina, Cerebral Peduncles
Midbrain Origin
embryonic mesencephalon
Corpora Quadrigemina
superior colliculi- visual attention, tracking movment, some reflexes
inferior colliculi- relays signals from inner ear to thalamus
Cerebral Peduncles
-two anterior stalks
-anchors cerebrum to brainstem
-each has three parts; tegmentum, substantia nigra, cerebral crus
Tegmentum
connects to and from cerebellum for motor control
substantia nigra
suppresses unwanted body movement
Cerebral crus
-connects cerebrum to pons
-carries sorticospinal tract