Bio 223L Lab 8- Spinal Cord, autonomic and somatic reflexes and peripheral nerves

Anterior white column

#3

dorsal ramus

A

ventral ramus

B

The pupillary light reflex is a constriction? dilation? of the pupils in response to stimulation of the retina by bright light.

Constriction

The ciliospinal is a constriction? Dilation? Of the pupils in response to a painful stimulus.

Dilation

Cranial nerve I? II? IV? contains the sensory fibers for the Pupillary light reflex arc.

II

Cranial nerve II? III? IV? contains the motor fibers for the Pupillary light reflex arc.

III

Patellar reflex

Knee extension

Achilles' reflex

Plantar flexion

Cranial nerve II? V? X? contains the sensory fibers for the oculocardiac reflex arc.

V

Cranial nerve II? V? X? contains the motor fibers for the oculocardiac reflex arc.

X

The normal Oculocardiac reflex is an acceleration? slowing? of the heart rate in response to pressure over the eyeballs.

slowing