Lab 10 the Intro to the nervous system

A

Dendrites

B

Axon

C

Soma

Neuromuscular junction

A

Vesicles of neurotransmitter

B

Motor end plate

A

cervical enlargement

B

lumbar enlargement

C

Cauda equina

D

Conus Medullaris

—cone shaped tapered low extermity of the spinal cord

E

Filum terminale

A

Dorsal Root Ganglion

B

Epidural space

C

Dorsal Horn

D

Ventral Horn

E

Dorsal Ramus

F

Spinal Nerve

G

Ventral Ramus

A

B

C

D

E

A

Dura Mater

B

Arachnoid mater

C

Ventral root

D

Spinal nerve

E

ventral ramus

F

lateral horn

*Only present at thoracic/upper lumber cord levels

G

Dorsal root

H

Dorsal column (funiculus)

i

dorsal ramus

j

Pia mater

A

Anterior horn

A

Posterior horn

Which Plexus is this?

Cervical plexus

Which Nerve is labeled A?

Phrenic Nerve

Name a muscle innervated by Nerve A

Diaphragm

Name the nerve labeled A

Axillary nerve

1. Deltoid

2. Teres Minor

Name the muscles innervated by nerve A

1. Deltoid

2. Teres Minor

Name the nerve labeled B

• Radial Nerve

1. Triceps Brachaii

2. Supinator

3. Brachioradialis

4. Extensor carpi radialis longus

5. Extensor carpi radialis brevis

6. Extensor Carpi Ulnaris

Name the muscles innervated by Nerve B

1. Triceps Brachaii

2. Supinator

3. Brachioradialis

4. Extensor carpi radialis longus

5. Extensor carpi radialis brevis

6. Extensor Carpi Ulnaris

Name the nerve labeled C

• Musculocutaneous nerve

1. Biceps brachii

2. Brachialis

Name the muscles innervated by nerve C

1. Biceps brachii

2. Brachialis

Name the nerve labeled D

what muscle does it innervate?

• Median Nerve

1. Flexor carpi radialis

2. Flexor digitorium

Name the muscles innervated by nerve D

1. Flexor carpi radialis

2. Flexor digitorium

Name the nerve labeled E

What muscle does it innervate

• Ulnar nerve

1. Flexor carpi ulnaris

Which Plexus is this?

Brachial Plexus

Which plexus is this?

Lumbar plexus

Name the nerve labeled A

Name a muscle innervated by A

• Femoral nerve

1. Rectus femoris

2. Vastus lateralis

3. Vastus intermedius

4. Vastus medialis

What muscles are innervated by nerve A

1. Rectus femoris

2. Vastus lateralis

3. Vastus intermedius

4. Vastus medialis

Name the nerve labeled B

Name a muscle innervated by B

• Obturator nerve

1. Adductor magnus

2. Adductor longus

3. Gracilis

What muscles are innervated by nerve B

1. Adductor magnus

2. Adductor longus

3. Gracilis

Which plexus is this?

Sacral plexus

Name the nerves labeled A
Name the muscle innervated by A

• Sciatic Nerve

1. Semitendinosis

2. Semimembranosus

3. Biceps femoris

4. Branches into Tibial and common fibular nerves

Name the nerve labeled B

Name the muscle innervated by B

Common Fibular Nerve

1. Fibularis longus

2. Fibularis brevis

3. Tibialis anterior

4. Extensor digitorum longus

5. Extensor digitorum brevis

name the nerve labeled C

name a muscle innervated by C

Tibial nerve

1. Adductor magnus

2. Flexor digitorum brevis

A

Lateral Column (funiculus) feniculi

B

Somatosensory tracts

(sensory information entering from body/skin)

C

Viserosensory tracts

(sensory information entering from viscera)

D

visceromotor tracts

(motor information going to to viscera)

E

somatic motor tracts

(motor information going out to skeletal muscles)

F

Ventral column

(funiculus)

G

Axons of motor neurons in ventral root

H

Axons of sensory neurons in dorsal root

1

Receptor

2

Sensory neuron

3

integration center

4

Motor neuron

5

Effector

A

Interneuron

B

spinal cord

C

Stimulus

D

skin

A

Cell body or Soma

B

Dendrites

C

Schwann cell or Myelin sheath

D

axon

E

Axon terminal

F

Motor end plate

A

Axon terminal

B

Vessicles of neurotransmitter

A

Foramen magnum

B

Cervical enlargement

C

cervival plexus

D

brachial plexus

E

Conus medularis

F

Cauda equina

G

Filum terminale

G
what is it
what is it filled with

Central canal
Filled with CNS

Define Tract

A bundle of axons in the CNS

Ascending VS Descending tracts

Ascending—Going up, Sensory info, to brain
Descending—going, motor info

What is is

what is its function

Foramen magnum

allows spinal cord to leave skull

The yellow part

what is it

what is its function

cauda equina

Horse tail

bundle of nerve roots for lower half of body

The blue part

what is it

what is its function

Filum terminale

Anchors and stabilizes lower spine

no nerves just membrane

Top left bracket

what is it

what is its function

Cervical enlargement

englarged because there are more nerves in the arms than the neck

2nd bracket down on the left

what is it

what is its function

Lumber enlargment

bundle of nerves for the legs

Plexus

A complex network of converging and diverging nerves that follow a specific orgizational schema

explain how nerve fibers that enter a plexus are reorganized within the plexus to form the peripheral nerves that emerge from that plexus

Imagine 5 different school buses (spinal nerves) arrive at a central camp layout (the plexus).

• Bus A has soccer players, art students, and swimmers.

• Bus B also has soccer players, art students, and swimmers.

• Inside the camp (plexus), all the kids get off the buses, mix together, and get resort-coded.

• When they leave, a brand new "Soccer Bus," "Art Bus," and "Swimming Bus" (the peripheral nerves) exit the camp, with every student perfectly organized by the activity they are going to do