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Exercise 28 (p. 213)

Name the purely SENSORY cranial nerves.

Olfactory Nerve (I), Optic Nerve (II), and the Vestibulocochlear Nerve (VIII)

Name the purely MOTOR cranial nerves.

Oculomotor Nerve (III), Trochlear Nerve (IV), Abducens Nerve (VI), Spinal Nerve (XI), and the Hypoglossal Nerve (XII)

Name the MIXED (sensory and motor) cranial nerves.

Trigeminal Nerve (V), Facial Nerve (VII), Glossopharyngeal Nerve (IX), and the Vagus Nerve (X)

The major function of the OLFACTORY nerve (I) is

smell, which contributes to taste.

The major function of the OPTIC nerve (II) is

vision.

The major functions of the OCULOMOTOR nerve (III) are

eye movements, including pupil dilation and constriction.

The major functions of the TROCHLEAR nerve (IV) are

eye movements.

The major functions of the TRIGEMINAL nerve (V) are

sensory of the face and chewing movements.

The major functions of the ABDUCENS nerve (VI) are

eye movements.

The major functions of the FACIAL nerve (VII) are

sensory qualities of taste and the tongue and movements that affect facial expressions, also allowing for salivation (a function of the autonomic nervous system).

The major functions of the VESTIBULOCOCHLEAR nerve (VIII) are

hearing and equilibrium.

The major functions of the GLOSSOPHARYNGEAL nerve (IX) are

sensory qualities of taste and tongue sensations, movements involved in swallowing, and also allowing for salivation and carotid body control of blood pressure (functions of the autonomic nervous system).

The major functions of the VAGUS nerve (X) are

sensory qualities of the outer ear, thoracic and abdominal viscera, movements involved in swallowing, and also thoracic and abdominal viscera function (function of the autonomic immune system).

The major functions of the SPINAL (accessory) nerve (XI) are

voluntary and reflex movements of the head and neck.

The major functions of the HYPOGLOSSAL nerve (XII) are

movements of the tongue.

There are ____ cranial nerve (CN) pairs that exit the brain and brainstem (written 'CN' followed by a Roman numeral).

twelve

CN's can be

sensory, motor, or both.

The ____ is the old name for the cerebrum.

cortex

The cerebrum has ____ lobes.

five

The lobes of the cerebrum include the:

(1) FRONTAL lobe, (2) PARIETAL lobe, (3) OCCIPITALlobe, (4) TEMPORAL lobe, and (5) INSULA lobe (island of Reil).

The insula lobe is located

in the inner, middle area of the cerebrum.

The CENTRAL SULCUS (of Rolando) separates

motor (frontal) and sensory (parietal).

The LATERAL SULCUS (of Sylvius) separates

the parietal and temporal lobes.

The LONGITUDINAL FISSURE lies between the

two cerebral hemispheres.

The TRANSVERSE FISSURE lies between the

cerebrum and cerebellum.

The ____ contains anything named 'thalamus.'

diencephalon

The diencephalon is located in the

central area of the brain.

The hindbrain refers to the

cerebellum.

The VERMIS connects the

cerebellar hemispheres.

The ARBOR VITAE is the

white matter of the cerebellum.

The brainstem has ____ major parts.

three

The brainstem includes the:

(1) midbrain, (2) pons, and (3) medulla oblongata.

The separation between the brainstem and the spinal cord is the

foramen magnum (inside the foramen magnum is the spinal cord, and outside the foramen magnum is spinal cord).

GYRI are the

RIDGES.

SULCI are the

VALLEYS.

The CORPUS CALLOSUM is the

white matter connecting the cerebral hemispheres.

The VENTRICLES are the

warehouse for cerebrospinal fluid (CSF).

The INTERVENTRICULAR FORAMEN connects the

lateral ventricles to the fourth ventricle.

The CHOROID PLEXUS makes

CSF via ependyma cells that line the ventricles.

____ absorbs CSF and diffuses it into the venous sinuses.

ARACHNOID VILLI

There are ____ ventricles.

four

The four ventricles of the brain include the

lateral ventricles (there are two), and third and fourth ventricles.

The MOTOR area (for voluntary muscle control) of the brain is the

pre-central sulcus area.

The MOTOR SPEECH area of the brain is the

Broca's area.

The SENSORY SPEECH area of the brain is the

Wernicke's area.

The CUTANEOUS SENSORY area of the brain is the

post-central sulcus area.

The AUDITORY area of the brain is the

...

The VISUAL area of the brain is the

...

What is the mnemonic device for remembering the order of the cranial nerves?

On Old Olympus Towering Tops, A French And German Viewed Some Hops (Olfactory (I), Optic (II), Oculomotor (III), Trochlear (IV), Trigeminal (V), Abducens (VI), Facial (VII), Auditory/Vestibulocochlear (VIII). Glossopharyngeal (IX), Vagus (X), Spinal (XI), and Hypoglossal (XII).

What is the mnemonic device for remembering which cranial nerves are sensory, motor, or mixed?

Some Say Marry Money, But My Brother Says, "Bad Business Marry Money," (Olfactory (sensory), optic (sensory), oculomotor (motor), trochlear (motor), trigeminal (both), abducens (motor), facial (both), auditory (sensory), glossopharyngeal (both), vagus (both), spinal (motor), hypoglossal (motor).

Tracts exist in the ____ only.

CNS

Nerves exist in the ____ only.

PNS

Nuclei are collections of nerve cells in the ____.

CNS

Ganglia are collections of nerve cells in the ____.

PNS

____ spinal nerves are ____ nerves.

ALL, mixed

The anterior root and the posterior root come together to form the

spinal nerve (making both sensory and motor present).

The spinal nerve is formed at the

intervertebral foramina (IVF) and where the meninges end.

The anterior root is

motor.

The posterior root is

sensory.

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