Bio 223 Lab #8 Spinal Cord, Autonomic & Somatic Reflexes & Peripheral Nerves (CSN)

Axillary

In the armpit area

Radial (1)

In the armpit area

Radial Nerve

On the forearm

Musculocutaneous

In the armpit area

Ulnar

Median

Axillary (2)

1

Radial (3)

2

Musculocutaneous (2)

3

Ulnar (2)

4

Median (2)

5

Intercostals

Obturator

Femoral

Sciatic (1)

On the inside part of the illiac

Sciatic (2)

Back of thigh

Sciatic (3)

tibial nerve

common fibular nerve (1)

Common Fibular (2)

Gray Mater

Anterior Gray Horns

Lateral Gray Horns

Posterior Gray Horns

White Mater

Anterior White Columns

Posterior White Columns

Lateral White Columns

Gray Commissure

Central Canal

Dorsal(Posterior) Root (Of spinal cord)

Ventral (anterior) root (of spinal cord)

Dorsal Root Ganglia

Spinal nerve

(Where the nerves connect)

Sympathetic chain

(More then one ___________ ganglion)

Dorsal Root Ganglion

Conus Medullaris

Filum Terminale

Cauda Equina

Ventral Ramus

Dorsal Ramus

White Ramus Communicans

Gray Ramus Communicans

Posterior Gray Horn

Lateral Gray Horn

Anterior Gray Horn

Posterior White Column

Lateral White Column

Anterior White Column

Anterior Median Fissure

Gray Commissure

Central Canal

Autonomic

Is the Pupillary Light reflex, somatic or autonomic?

Pupils Constrict

What is the normal response to the Pupillary light reflex?

Autonomic

Is the Oculocardiac reflex, somatic or autonomic?

Slows heart rate down

What is the normal response to the oculocardiac reflex?

Autonomic

Is the Ciliospinal reflex Autonomic or somatic?

Pupils Dilate

What is the normal response of the ciliospinal reflex?

Somatic

Is the Patellar reflex, somatic or autonomic?

Extension at knee

What is the normal response to the patellar reflex?

Somatic

Is the Achilles reflex somatic or autonomic?

Extension at ankle

What is the normal response of the Achilles reflex?

Somatic

Is the Babinski reflex somatic or autonomic?

Plantar flexion (Adult-curls toes)

(Child-Fans Toes)

What is the normal response to the Babinski reflex?

Watch the pupils of your lab partners eyes as you pinch their neck firmly

How would you test the Ciliospinal reflex?

Have your lab partner sit down and close their eyes for one minute. When they open their eyes flash a bright light into them, watch the change in the size of their pupils

How would you test the pupillary light reflex?

Count your partners pulse when they are sitting

Continue to hold wrist, have them use their fingers to exert firm pressure on their eyeballs and immediately count their pulse.

How would you test the Oculocardiac reflex?

Dilation

Is the Ciliospinal reflex a constriction or dilation?

Constriction

Is the pupillary reflex a constriction or dilation?

II, Optic nerve

Which cranial nerve contains sensory fibers for the pupillary light reflex?

III, Occulomotor

Which cranial nerve contains motor fibers for the pupillary light reflex?

V, Trigeminal

Which Cranial nerve that contains sensory fibers for the oculocardiac reflex?

X, Vagus

Which cranial nerve that contains the motor fibers for the oculocardiac reflex?

Tap the skin over the patellar tendon with a rubber hammer

How would you test the Patellar reflex?

Have the subject stand with one knee on a chair and relax their leg muscles

Hold the foot of the subject, to stretch their gastrocnemius

Tap the skin over the achilles tendon with a rubber hammer

How would you test the Achilles reflex?

Have your subject remove their shoe and sock from their right foot

Take the tip of a rubber mallet and run it on the sole of the foot firmly in an upward movement from heel to arch

How would you test the Babinski reflex?

Negative is normal

Is it normal for an adult to have a positive or negative response to the Babinski reflex?

Child or younger

Who should demonstrate a positive response to the Babinski reflex?

Epineurium

Outside Layer

Perineurium

layer of connective tissue surrounding fascicles within a nerve

Endoneurium

surrounds each nerve fiber (B)

Fascicle

bundle of fibers

Peripheral Nerve

A nerve that branches from a plexus and supplies sensory and motor functions to many areas of the body.

1. stretch both arms to the side and snap the fingers on both hands

2. walk a straight line placing the heel of one foot in front of the toe of the other foot

3. Close your eyes and touch your nose with the index finger of your left hand

4. Close your eyes and touch your nose with the index finger of your right hand

5. While standing, move the heel of your right foot first up and then down the shin of your left leg.

How to test the Cerebellar Function?