HP 1420 Lab Exam 3

Central Nervous System (CNS)

made up of brain and spinal cord

Peripheral Nervous System (PNS)

made up of sensory receptors and nerves

Corpus Callosum

Thalamus

Diencephalon

Hypothalamus

Brainstem

Midbrain

Medulla Oblongata

Pons

Pituitary Gland

Cerebellum

Corpora Quadrigemina

Longitudinal Fissure

Gyrus (Hill)

Sulcus (Valley)

Frontal Lobe

Temporal Lobe

Parietal Lobe

Occipital Lobe

Corpus Callosum is a

C shaped nerve fiber bundle that connects the right and left hemispheres of the brain; holds two hemispheres together

Ventricles are

communication cavities of the CNS

Lateral Ventricle

Third Ventricle

Cerebral aqueduct

Fourth Ventricle

Olfactory

Sensory; smell

Optic

sensory; vision

Oculomotor

motor; most eye movement/eye dilation

Trochlear

motor; moves eye

Oh oh oh to taste and feel very good v*gina and h*men

Olfactory, optic, oculomotor, trochlear, trigeminal, abducens, facial, vestibulocochlear, glossopharyngeal, vagus, accessory, hypoglossal

Trigeminal

both; face sensation and taste

Abducens

motor; abducts the eye (lateral eye movement)

Facial

both; facial expression and taste

Vestibulocochlear

sensory; hearing and balance

Glossopharyngeal

both; gag reflex and taste

Vagus

both; gag reflex and parasympathetic innervation

Accessory

motor; shoulder shrug

hypoglossal

motor; swallowing and speech

Spinal Nerves

31 pairs

Why is there no dermatomes on the face?

cranial nerves

dermatome

An area of skin supplied with sensory innervation by a pair of spinal nerves

Different types of plexuses

Cervical, Brachial and Lumbosacral

Brachial Plexus consists of

radial nerve, ulnar nerve, medial nerve and musculoskeletal nerve

Radial Nerve

Ulnar Nerve

Musculocutaneous Nerve

Medial Nerve

Descending Neuron

carries signals from brain to spinal cord

Step 1

What step is the sensory receptor in Spinal Reflex Arc?

Sensory Receptor (located in skin)

Step 2

In what step is the afferent neuron involved in?

Afferent Neuron (Sensory) Ascends up to Spinal Cord

Step 3

What step does synapses w/ interneuron occur?

Synapses with Interneuron

Step 4

In what step is the efferent neuron connection occur?

Connect to Efferent Neuron (Motor)

Step 5

In what step does stimulating effector organ (muscle) occur?

Stimulate Effector Organ (Muscle)

Descending neuron with cell body in Motor Cortex

Cervical Spinal Nerves

C1 to C8

Thoracic Spinal Nerves

T1-T12

Lumbar Spinal Nerves

L1-L5

Sacral Spinal Nerves

S1-S5

Olfactory Bulb (where olfactory nerves enter)

Optic Nerve

Oculomotor Nerve

Trochlear Nerve

Trigeminal Nerve

Abducens Nerve

Facial Nerve

Vestibulocochlear Nerve

Glossopharyngeal Nerve

Vagus Nerve

Hypoglossal nerve

Accessory Nerve

Plexuses

A network of nerves or vessels in the body

Pituitary Gland