Unit I: Sensory Innervation of the Neck and Head

Question 1

This nerve is the MOTOR supply to the muscles of facial expression

Answer 1

Facial Nerve (C.N. VII)

Question 2

Paralysis of the facial nerve causing muscular weakness to one side of the face.

Answer 2

Bell’s Palsy

Question 3

Branches of this nerve provide sensory innervation to the face.

Answer 3

Trigeminal nerve (C.N. V)

Question 4

The Trigeminal nerve divides into these 3 branches BEFORE emerging onto the face

Answer 4

1) Opthalmic nerve
2) Maxillary nerve
3) Mandibular nerve

Question 5

This nerve is the sensory supply for the FACE all the way to the vertex of the SCALP

Answer 5

Opthalmic nerve (branch of trigeminal nerve) (V1)

Question 6

This nerve is the sensory supply to the CHEEK and area LATERAL to the ORBIT

Answer 6

Maxillary nerve (branch of trigeminal nerve) (V2)

Question 7

This nerve is the sensory supply for the CHIN and TEMPORAL region. It is the most INFERIOR branch of the trigeminal nerve.

Answer 7

Mandibular nerve (branch of trigeminal nerve) (V3)

Question 8

Subdivisions of the Opthalmic nerve

Answer 8

1) Supraorbital nerve
2) Supratrochlear nerve
3) External Nasal nerve
4) Infratrochlear nerve
5) Lacrimal nerve

Question 9

This nerve is one of the branches of the Opthalmic nerve that comes out through a foramen in the orbit and provides sensory supply all the way to the vertex of the scalp

Answer 9

Supraorbital nerve

Question 10

This nerve is one of the branches of the Opthalmic nerve that is more medial and supplies sensory input to the area SUPERIOR to the NOSE

Answer 10

Supratrochlear nerve

Question 11

This nerve is one of the branches of the Opthalmic nerve that supplies sensory input to the OUTSIDE of the NOSE

Answer 11

External Nasal nerve

Question 12

This nerve is a branch of the Opthalmic nerve that comes out BELOW the trochlear nerve and supplies sensory input to the area INFERIOR to the ORBIT

Answer 12

Infratrochlear nerve

Question 13

This nerve is a branch of the Opthalmic nerve that supplies sensory input ABOVE the LATERAL aspect of the eye

Answer 13

Lacrimal nerve

Question 14

This is a branch of the Maxillary nerve that supplies sensory input to the ANTERIOR TEMPORAL region of the face

Answer 14

Zygomaticotemporal nerve

Question 15

This is a branch of the Maxillary nerve that supplies sensory input to the CHEEK bones

Answer 15

Zygomaticofacial nerve

Question 16

This branch of the Maxillary nerve is very LARGE and supplies sensory input to the ENTIRE area BELOW or INFERIOR to the ORBIT. This is the MOST frequently injured nerve of the face when there is a blow to the face.
–Common in boxers

Answer 16

Infraorbital nerve

Question 17

This branch of the Mandibular nerve is very LONG and supplies sensory input to the TEMPORAL region

Answer 17

Auriculotemporal nerve

Question 18

This branch of the Mandibular nerve supplies sensory input to the CHEEK

Answer 18

Buccal nerve

Question 19

This branch of the Mandibular nerve comes through an opening in the mandible and supplies sensory input to the CHIN

Answer 19

Mental nerve

Question 20

This condition is characterized by SUDDEN attacks of SEVERE pain occurring in the area of SENSORY distribution of the TRIGEMINAL nerve.

• Often due to TOUCH
• Occurs MOST commonly in the MAXILLARY division
• Second most common is the mandibular division and the LEAST common is the opthalmic division
• UNKNOWN cause
• Spinal trigeminal nucleus extends down to C4 and is involved with pain reception from the face

Answer 20

Trigeminal Neuralgia (Tic Douloureux)

Question 21

The SENSORY innervation of the POSTERIOR aspect of the NECK and SCALP

Answer 21

Posterior (dorsal) primary rami of cervical nerves C2, C3, and C4

Question 22

This sensory nerve supplies the OCCIPITAL region. It is also called the Posterior Primary Ramus of C2

Answer 22

Greater Occipital nerve

Question 23

This sensory nerve supplies the UPPER part of the BACK of the NECK. Also called the Posterior Primary Ramus of C3.

Answer 23

Third Occipital nerve

Question 24

This sensory nerve supplies the LOWER part of the BACK of the NECK.

Answer 24

Posterior Primary Ramus of C3

Question 25

This cervical nerve has NO posterior root carrying sensory fibers. It is ONLY a MOTOR nerve

Answer 25

C1

Question 26

The SENSORY innervation of the ANTERIOR and LATERAL aspect of the NECK

Answer 26

Anterior (ventral) primary rami of cervical nerves C2, C3, and C4

Question 27

This plexus is formed from the ANTERIOR primary rami of C1, C2, C3, and C4

Answer 27

Cervical plexus

Question 28

These nerves supply SENSORY innervation to the SKIN of the UPPER LIMB (from the Brachial plexus)

Answer 28

C5, C6, C7, C8

Question 29

This sensory branch of the cervical plexus supplies the LATERAL part of the OCCIPITAL region just POSTERIOR to the EAR

Answer 29

Lesser occipital nerve (C2)

Question 30

This sensory branch of the cervical plexus supplies the angle of the MANDIBLE and the area INFERIOR to the EAR. It runs with the External Jugular Vein

Answer 30

Great Auricular nerve (C2, C3)

Question 31

This sensory branch of the cervical plexus supplies the ANTERIOR surface of the NECK (the throat)

Answer 31

Transverse Cervical nerve (C2, C3)

Question 32

This sensory branch of the cervical plexus supplies the LATERAL surface of the NECK down to the shoulder. It has 3 subdivisions (medial, intermediate, and lateral)

Answer 32

Supraclavicular nerve (C3, C4)

Question 33

The THREE subdivisions of the Supraclavicular nerve of the Cervical plexus

Answer 33

1) Medial Supraclavicular nerve 2) Intermediate Supraclavicular nerve 3) Lateral Supraclavicular nerve

Question 34

The Cervical plexus carries MOTOR fibers to this group of muscles

Answer 34

Infrahyoid (strap) muscles

Question 35

Motor fibers of the Cervical plexus arise from this loop

Answer 35

Ansa Cervicalis

Question 36

The two parts of the Ansa Cervicalis (where motor fibers arise in cervical plexus)

Answer 36

a) Superior root | b) Inferior root

Question 37

This part of the Ansa Cervicalis (from C1 or C1 and C2) descends from the HYPOGLOSSAL nerve to join the inferior root

Answer 37

Superior Root

Question 38

This part of the Ansa Cervicalis (from C2 and C3) descends from CERVICAL nerve branches to join with the superior root

Answer 38

Inferior Root

Question 39

These two roots UNITE for form the Ansa Cervicalis[C2, C3, C4] (loop where motor fibers arise from in Cervical plexus)

Answer 39

Superior and Inferior roots

Question 40

This supplies the MOTOR input to 3 of the 4 infrahyoid muscles (sternohyoid, sternothyroid, and omohyoid)

Answer 40

Ansa Cervicalis

Question 41

The THREE muscles supplied by the Ansa Cervicalis

Answer 41

a) Sternohyoid b) Sternothyroid c) Omohyoid

Question 42

This muscle receives its innervation ONLY from the C1 fibers via the Hypoglossal nerve

Answer 42

Thyrohyoid

Question 43

This nerve is normally considered part of the Cervical plexus and it ORIGINATES from C3, C4, and C5

Answer 43

Phrenic nerve

Question 44

This nerve supplies the MOTOR input to the DIAPHRAGM

Answer 44

Phrenic nerve

Question 45

This nerve supplies the SENSORY input to the membranes of the THORAX and ABDOMEN

Answer 45

Phrenic nerve

Question 46

This MIXED nerve is found in the NECK lying on the ANTERIOR surface of the ANTERIOR SCALENE muscle. It runs VERTICALLY down the scalene and into the thorax

Answer 46

Phrenic nerve

Question 47

Muscles that ____ the mouth are STRONGER because they go AGAINST gravity

Answer 47

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