Download D170 Applied Human Anatomy Winter 2015 Dr

Central Nervous System
.
Study the cranial nerves
We’ll have a clicker competition in 10 minutes!
Nerve
Olfactory (I)
Optic (II)
Oculomotor
(III)
Trochlear (IV)
Trigeminal (V)
Abducens (VI)
Facial (VII)
Vestibulococh
lear (VIII)
Glossopharyn
geal (IX)
Vagus (X)
Accessory (XI)
Hypoglossal
(XII)
Sensory type
Sensory
function
Motor type
Motor
function
Origin
Skull foramina
passed
through
Which of the following is associated with smell?
A. I
B. II
C. III
D. IV
What is nerve E?
A. Optic
B. Oculomotor
C. Trochlear
D.Trigeminal
What cranial nerve contains three divisions?
A. IV
B. Trigeminal
C. Facial
D. Glossopharangeal
E. IX
An injury causes difficulty in speech and swallowing.
What cranial nerve might be affected?
A – Facial
B – Optic
C – Hypoglossal
D – Oculomotor
E – Trochlear
What is nerve R?
A. Trochlear
B. Optic
C. Abducens
D.Trigeminal
A woman experiences dizziness (usually spinning) when
standing still. What cranial nerve might be affected?
A – Vagus
B – Vestibulocochlear
C – Glossopharyngeal
D – Abducens
E – Accesssory
Sticking your tongue out requires functional:
A. Hypoglossal nerves
B. Accessory nerves
C. Nerve VIIs
D. Nerve IXs
What is nerve W?
A. Vagus
B. Oculomotor
C. Trochlear
D.Trigeminal
The Spinal Nerves
Rank the following protective components from surface
to deep:
• Arachnoid mater, pia mater, spinal dura mater
Spinal Nerve Exits
Where do these spinal nerves exit
the vertebral column? The spinal
cord?
Spinal nerve
Exit vertebral
column
Exit spinal
cord
C1
Superior to Superior to
C1
C1
T8
Inferior to Superior to
T8
T8
L2
Inferior to Superior to
L2
T11
S3
Inferior to Superior to
S3
L1
Nerve Plexuses
Where are the following
plexuses?
A. Cervical
B. Brachial
C. Lumbar
D. Sacral
Nerve Plexuses
Where are the following
plexuses?
A. Cervical (C1 – C5)
B. Brachial (C5 – C8, T1)
C. Lumbar (L1 – L4)
D. Sacral (L4 – S4)
Building a spinal cord
1. Which side is dorsal,
which is ventral?
2. What “horn” names are
given to the regions of
gray matter?
3. What section of the spinal
cord is this?
4. Label the four types of
neurons in the gray
matter: somatic and
visceral sensory, somatic
and visceral motor.
What’s the spinal cord made of?
Dorsal (posterior) median sulcus
1.
2.
3.
4.
Which side is dorsal,
which is ventral?
What “horn” names
are given to the
regions of gray
matter?
What section of the
spinal cord is this?
Label the four types of
neurons in the gray
matter: somatic and
visceral sensory,
somatic and visceral
motor.
Dorsal horn
SS
VS
VM
SM
Lateral horn
Ventral horn
Ventral (anterior) median fissure
T1 to L2
Spinal Cord
Label these structures:
A
B
C
D
E
1. What part of the neuron does a dorsal root contain?
2. What part of the neuron does the ventral root contain?
3. What is the order of branching of the following: root, rootlet,
spinal nerve, ramus
Ventral root
Dorsal root
Dorsal root
ganglion
Dorsal ramus
of spinal nerve
Ventral ramus
of spinal nerve
Spinal nerve
Rami communicantes
Dorsal and ventral
rootlets of spinal
nerve
Stuff to notice:
1. Where are sensory and
motor neurons
separate?
2. Where are the cell
bodies for sensory or
motor neurons?
1. Nerve plexuses receive many ventral
rami, all mixed up.
2. Ventral rami become roots, but these
are NOT the same roots as in the
spinal cord. Roots – trunks – divisions
(anterior & posterior) – cords.
Find the following nerves:
Musculocutaneous
Median
Ulnar
Radial
Axillary
Find the following nerves:
Musculocutaneous
Median
Ulnar
Radial
Axillary
Axillary nerve
Radial
nerve
Musculocutaneous
nerve
Ulnar nerve
Median
nerve
Radial nerve
(superficial
branch)