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Cranial Nerves
Cranial nerves
52
Veterinary Medicine
Graduate
09/27/2012

Additional Veterinary Medicine Flashcards

 


 

Cards

Term
Oculomotor innervates
Definition

DMV rectus mm

Ventral oblique m.

 

Levator palprebrae superioris m. (lifts eyelid)

 

Constrictor pupillary m.

Ciliary m.

Term
Trochlear n. innervates
Definition
Dorsal oblique m. (rotates eye so dorsal surface moves toward nose)
Term
Abducent n. innervates
Definition

Retractor bulbi m. (pulls eye caudally into orbit, protrudes 3rd eyelid)

 

Lateral Rectus m.

Term
Facial n. innervates
Definition

Nasal, lacrimal, mandibular, sublingual glands

 

Skeletal mm. that produce facial expression

 

obicularis oculi (closes eye)

 

Caudal belly of digastricus m.

Term
Glossopharyngeal n. innervates
Definition
Parotid and zygomatic salivary glands
Term
Vagus n. innervation
Definition

Smooth muscle associated with abdominal and thoracic viscera

 

Laryngeal mm.

Term
Hypoglossal n. innervates
Definition

Tounge muscles ( geniglossis, hypoglossis, styloglossis, geniohyoideus mm.)

 

Sternohyoideus, sternothyroideus mm.

Term
Accessory n. innervation
Definition

Motor innervation to muscles of the neck

 

trapezius, omotransversarious, clieodcephalicus, sternocephalicus

Term
Function of diagastricus m.
Definition
opens jaws
Term
Innervation of diagastricus mm.
Definition

mandibular n.

facial n.

Term
Masseter m. function
Definition
raise mandible, draw towards active side (small in dogs, large in herbivores)
Term
termporalis m. function
Definition
pulls mandible upward
Term
termporalis m. innervation
Definition
mandibular n.
Term
masseter innervation
Definition
mandibular n.
Term
cricoarytenoideus lateralis innervation
Definition
caudal laryngeal n. (recurrent)
Term
cricoarytenoideus dorsalis n. innervation
Definition
caudal laryngeal n. (recurrent)
Term
cricothyroid m. innervation
Definition
cranial laryngeal n. (branch of vagus)
Term
thyroarytenoideus m. innervation
Definition
caudal laryngeal n. (recurrent)
Term
cricoarytenoideus lateralis m. function
Definition
closes glottis
Term

cricoarytenoideus dorsalis m. function

Definition
opens glottis
Term
cricothyroid m. function
Definition
tenses vocal fold
Term
thyroarytenoideus m. function
Definition
relax vocal fold, constrict glottis
Term
Boundries of laryngeal ventrical
Definition

Laterally by thyroid cartilage

Medially by arytenoid cartilage

Rostrally vestibular fold

Caudally vocal fold

Term

M. runs along bottom of met, forms a v on ventral view with sternum - inserts at masteoid part of temporal bone and nuchal crest of occipital bone.

 

Jugular vein sits on lateral surface

Definition
Sternocephalicus m.
Term

Lies on trachea with midventral groove that separates L and R muscles

 

Insertion: basihyoid bone

Definition
Sternohyoideus m.
Term
Function of sternohyoideus m.
Definition
pull tongue and larynx caudally
Term
Neck m. that inserts on caudolateral surface of thyroid cartilage
Definition
Sternothyroideus m.
Term
MM. whose functions are to pull tongue and larynx caudally
Definition
sternothyroideus m. and sternohyoideus m.
Term
What is in the carotid sheath?
Definition

Common carotid artery

 

Vasosympathetic nerve trunk

 

Internal jugular vein

 

Tracheal lymphatic trunk

Term
Pyramidal tract
Definition

1. Upper motor neurons (sensory-motor cortex; frontoparietal lobe)

 

2. Internal capsule

 

3. Crus crebri

 

4. Pons

 

5. Pyramids

 

6. Corticospinal tract - LMN in ventral roots of spinal cord

 

7. Skeletal muscles

Term
Lemniscal Pathway Function
Definition
Conscious somatic afferent pathway - assessment of intensity of pressure, sensation, proprioception
Term
Lemniscal Pathway Steps
Definition

1. Cell bodies in dorsal root ganglion and trigeminal ganglion

 

2. Dorsal funiculus (synapse)

-Fasciculus gracile (pelvic limb)

- Fasciculus cutaneus (thoracic limb) 

 

3. Decussate medial lemniscus tract to thalamus (synapse)

 

4. Sensory motor cortex in frontoparietal lobe

Term
Visual pathway
Definition

1. Retina (light)

 

2. Optic n.

 

3. Optic chiasm

 

Processing of visual info: Lateral geniculate nucleus --> internal capsule --> occipital cortex

 

OR

 

Reflexive: Rostral colliculus --> rostral colliculus -->eye movement/lens diameter

Term
Vestibular pathway function
Definition
Head position and motion sensations
Term
Vestibular pathway
Definition

Vestibular nuclei (in ear) --> trapezoid body --> caudal peduncle --> cerebellum (unconscious proprioception and body posture)

 

Others go to temporal lobe of cereberum (conscious adjustment of posture)

Term
Auditory pathway
Definition
Processing of auditory stimuli
Term
Auditory pathway
Definition

Cochlear receptors -->  brainstem (synapse) --> trapezoid body (ventral brain stem)-->


Caudal colliculus

or

Medial geniculate body    


Axons of conscious hearing --> temporal cerebral cortex 

Others go to hearing reflexes

Term
Olfactory pathway
Definition
Olfactory receptors-->cribiform plate-->olfactory bulbs (synapse)-->common olfactory tract-->primiform lobe
Term
Autonomous zone of mandibular n.
Definition
Lower lip or tongue
Term

Autonomous zone of maxillary n.

Definition
Upper lip
Term

Autonomous zone of opthalamic n.

Definition
Skin dorsomedial to medial angle of eyelid; nasal septum mucosa
Term
Nucleus for processing of visual stimuli
Definition
Lateral geniculate nucleus
Term
trapezoid body
Definition
vestibular pathway
Term
n. transversing infraorbital foramen
Definition
infraorbital n. of maxillary n. of trigeminal n.

skin of lateral muzzle and upper lip
Term
sensory rostral 2/3 of tongue
Definition
lingual n. of mandibular n. of trigeminal n.
Term
motor to myohyoid mm.

sensory to mandibular teeth
Definition
inferior alveolar n. of manidbular n. of trigeminal n.
Term
PLR innervation

n.

m.
Definition
oculomotor n.

sphincter pupillae m.
Term
pupil size innervation
Definition
oculomotor; PARA = PLR constrict, SYMPA = dilate
Term
taste to rostral 2/3 of tongue
Definition
facial n.
Term
glossopharyngeal n. goes through
Definition
jugular foramen and tympano-occipital fissure
Term
sensory to caudal 1/3 of tongue
Definition
glossopharyngeal n.
Term
accessory n. travels through
Definition
jugular foramen via tympano-occipital fissure
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