Unit 3 Exam
Flocculonodular lobe function
Balance and eye movements
Vermis function
Connects the two hemispheres of the cerebellum Posture, locomotion, fine motor coordination
Corpora quadrigemina
Located in the midbrain; contains reflex centers for vision (superior colliculi) and auditory (inferior colliculi) reflexes
Lateral geniculate nucleus receives:
Visual information
Roles of the sympathetic division
"fight or flight" Mobilizes body during activity e.g. exercise, excitement, emergency, and embarassment
Role of the parasympathetic division
"rest-and-digest" Keeps energy use as low as possible to carry out maintenance activities
Key anatomical differences between ANS divisions
1. Sites of origin 2. Relative lengths of fibers 3. Location of ganglia
Cranial nerve XI
Accessory No sensory function Motor function
ACh is released by cholinergic fibers at:
All ANS preganglionic axons All parasympathetic postganglionic axons
Dual innervation
All visceral organs are served by both the sympathetic and parasympathetic divisions, but these divisions cause opposite effects
Pontine
Anterior portion of the pons Relay between cerebrum and cerebellum
Medial geniculate nucleus receives:
Auditory information
Subthalamus
Contains subthalamic nuclei, parts of red nuclei and substantia nigra Involved in controlling motor function
Pyramids
Descending nerve tracts on the anterior surface Inferiorly fibers cross; thus each half of the brain controls the opposite half of the body
Cranial nerve VII
Facial Taste Motor function
Cranial nerve IX
Glossopharyngeal Taste Motor function
Cranial nerve XII
Hypoglossal No sensory function Motor function
The nuclei of which cranial nerves are in the midbrain
III-V
Hypothalamus function
Important in regulation of mood, emotion, sexual pleasure, satiation, rage, and fear
Pineal gland function
May influence sleepiness, helps regulate biological clock, may play a role in the onset of puberty
Inferior cerebellar peduncles communicate to:
Medulla oblongata
Superior cerebellar peduncles communicate to:
Midbrain
Ventral geniculate nucleus receives:
Most other types of sensory information
Cranial nerve III
Oculomotor No sensory function Motor function
Cranial nerve I
Olfactory Smell No motor function
Cranial nerve II
Optic Vision No motor function
Habenula function
Part of the epithalamus Emotion and visceral responses to odors
Effectors
Somatic nervous system innervates skeletal muscles ANS innervates cardiac muscle, smooth muscle, and glands
Cranial nerve V
Trigeminal General sensation Motor function
Cranial nerve IV
Trochlear No sensory function Motor function
The nuclei of which cranial nerves are in the medulla
V IX-XII
The nuclei of which cranial nerves are in the pons
V-IX
Cranial nerve X
Vagus Taste Motor function
Cranial nerve VIII
Vestibulocochlear Hearing and balance Some motor function
Cerebellar lateral hemisphere function
Works with cerebrum to plan, practice, and learn complex movements
Cranial nerve VI
Abducens No sensory function Motor function
Middle cerebellar peduncles communicate to:
Pons
Olives
Rounded Protrude from anterior surface Nuclei within help regulate balance, coordination, modulation of sound from inner ear