exam 2 Flashcards
What ventricle “opens” the brainstem?
4th ventricle
Structures that are dorsal in the spinal cord are moved ??? in the brainstem.
Laterally
Structures that are ventral in the spinal cord are moved ??? in the brainstem.
Dorsal and medial
Do visceral structures shift when moving from the spinal cord to the brainstem? Where are they located?
No; remain between motor and sensory nuclei
Match the nuclei with their location.
Nuclei: Somatic motor, somatic sensory, visceral
Location: Lateral, intermediate, midline
Somatic motor: Midline
Somatic sensory: Lateral
Visceral: Intermediate
Areas of the brainstem related to cranial nerves develop ??? and areas not related to cranial nerves (i.e., basilar pons, inferior olivary nucleus) develop ???.
Related: develop dorsally
Not related: develop ventrally
Somatic motor nuclei
CN III, IV, VI, XII
Branchiomeric nuclei
CN V, VII, IX, X, XI
Visceral motor nuclei
CN III, VII, IX, X
Visceral sensory nuclei
CN VII, IX, X
Somatic sensory nuclei
CN V, VII, VIII, IX, X
General location of somatic motor nuclei
Medial
General location of branchiomeric nuclei
Shifted ventrally but still medial
General location of visceral motor nuclei
Just lateral to somatic motor nuclei
General location of visceral sensory nuclei
Lateral
General location of somatic sensory nuclei
Far lateral
What are branchiomeric nuclei? What is their function?
Nuclei that innervate branchiomeric muscles
Voluntary motor function
What are examples of visceral sensory functions?
Taste, sensory input from GI tract
What are examples of somatic sensory functions?
Hearing and balance
What is the dorsal surface of the medulla called? What is located there?
What is found in the ventral area of the medulla?
Dorsal surface is called tegmentum, cranial nerve nuclei are found here
Ventral area contains nuclei and fiber tracts related to motor control
What structures can be seen?
Rostral medulla (dorsal)
