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28 Cards in this Set

  • Front
  • Back
What are the functions of the Trigeminal nerve (Cr V)
- Sensory information from the face (pain, touch, temp)
- Connects Cr. III to Cr. VI to coordinate their movements when
What are the functions of Cr. VII (FACIAL)
- Submandibular, sublingual salivary glands: PARASYMP MOTOR
- Taste: Anterior 2/3rds of tongue
What are the functions of Cr. IX? (GLOSSOPHARYNGEAL)
- CAROTID SINUS baroreceptors/chemoreceptors
- Taste: Anterior 1/3rd of tongue (bitter/sour)
- Important for BREATH CONTROL
What are the functions of Cr. X (VAGUS)
- PARASYMP. reduction in hrtr8
- secretion/sensory in digestive, respiratory tract
What are the functions of Cr. XII (HYPOGLOSSAL)
- Tongue motor movements
How are MECHANORECEPTOR gps created?
Stretch sensitive channels open NONSPECIFIC ion channels, Na+ enters due to its greater driving force
G-protein mediated influence of ion channels
How is STIMULUS INTENSITY of a GP coded?>
Frequency/Population (not strength)
What are Ruffini endings?
TONIC (slowly) adapting skin receptors that detect constant pressure
What are secondary endings of muscle spindle?
- Detect CONSTANT length of intrafusal muscle fiber. TONIC (slowly adaptn)
What are Meissener's Corpuscles?
RAPIDLY adapting receptors in skin (eg fingertips) to detect changes
What are Pacinian corpuscles?
RAPIDLY adapting receptors in skin that detect VIBRATION. Joint capsules/ligaments
What are Merkel endings?
Slowly adapting receptors
What are primary muscle spindle receptors?
Signal the rate of change of muscle length. RAPIDLY adapting. Ia fibers!
What are Golgi tendon organs?
In muscle tendons: relay information about how forcefully a muscle is contracting. Ib fibers!
Where do fibers from the optic nerve terminate?
In the LATERAL GENICULATE NUCLEUS (LGN) of the thalamus (diencephalon)
From the LGN, where does the optic signal go?
To the primary visual cortex in the OCCIPITAL LOBE of the cerebral hemispheres
Where is position/visual stimulus handled in the cerebrum?
Posterior parietal lobe
Where is colour and form handled?
Inferior temporal lobe
What is an optic radiation?
The tract sending signals from the LGN to the occipital lobe (posterior parietal/inferior temporal)
Where do nerves from the vestibular apparatus go?
To the 4 the VESTIBULAR NUCLEI in the pontomedullary junction, then to their respective locations
Where does information from the SEMICIRCULAR CANALS go?
To the SUPERIOR vestibular nucleus, then to the medial longitudinal fasciculus to affect Cr. III and Cr. VI in eye movement
Where does information from the UTRICLE and SACCULE go?
To the MEDIAL and LONGITUDINAL vestibular nuclei
Where does the MEDIAL vestibular nucleus go?
To the neck and trunk
Where does the LATERAL vestibular nucleus go?
To the limbs
What does the INFERIOR vestibular nucleus do?
Process all information from the vestibular apparatus, sends it to the CEREBELLUM to affect movement.
Outline the pathway of HEARING from the cochlea
The signal travels in Cr. VIII to the COCHLEAR NUCLEUS in the brainstem, to the MEDIAL GENICULATE NUCLEUS (eyes are lateral) in the thalamus. From here, it is sent to the auditory cortex in the temporal lobe