Week 11 lab

Neuron

Neuron

Neurosoma

• cell body

Axon

Myelinated axon

Myelin sheath gap or Node of Ranvier

Dendrite

Neuroglia Cell or Glial cell

Connective Tissue Wrappings of a Nerve (all)

• Epineurium

• Fascicle

• Perineurium

• Endoneurium

• Myelinated Sheath

Epineurium

The _______ consists of a dense irregular connective tissue of collagen bundles that blends with the surrounding connective tissue. Epineurium surrounds larger trunks of peripheral nerves and is lost as peripheral nerves decrease in size.

Fascicle

The peripheral nervous system, located outside the central nervous system, consists of peripheral nerves, as well as their ganglia, nerve endings and ensheathments.  Individual axons are surrounded by an endoneurium, not easily seen at this magnification.  Groups of axons form a fascicle enclosed by a perineurium.  Groups of ______ form major nerve trunks enclosed by an epineurium.  100x

Perineurium

The ________ form a compact wrapping around fascicles that contributes to the protective blood-nerve barrier. These cells are squamous, exhibiting epithelial features, such as individual basal laminae and tight junctions. However, they also contract, possessing large numbers of actin filaments, and synthesize collagen. Thus, they also resemble smooth muscle cells and fibroblasts.

Endoneurium

Myelinated Sheath

Cerebrum

Cerebral  hemispheres (2)

• Left cerebral  hemisphere

• Right cerebral hemisphere

Left cerebral  hemisphere

Right cerebral hemisphere

Fissure

a deeper grove and is often used interchangeably with sulcus

Longitudinal fissure

Gyrus

a ridge-like elevation found on the surface of the cerebral cortex

Precentral gyrus

Postcentral gyrus

Sulcus

Central sulcus

Parieto-occipital sulcus

Lateral sulcus

Frontal lobe

Parietal lobe

Temporal lobe

Occipital lobe

Corpus callosum

Brainstem

Midbrain

Corpora quadrigemina

Pons

Medulla oblongata

Diencephalon

Hypothalamus

Pituitary gland

Mammillary body

Thalamus

Pineal gland

Optic chiasma

Optic tracts

Cerebellum

Arbor vitae

MENINX (Note: Meninges = plural)

Dura mater

Superior sagittal sinus

Subdural space

Arachnoid mater

Subarachnoid space

Pia mater

Lateral ventricle

Third ventricle

Cerebral aqueduct

Fourth ventricle

Central canal

Olfactory

(I)

Optic

(II)

Oculomotor

Oculomotor (III)

Trochlear

Trochlear (IV)

Trigeminal

Trigeminal (V)

Abducens

Abducens (VI)

Facial

Facial (VII)

Vestibulocochlear

Vestibulocochlear (VIII)

Glossopharyngeal

Glossopharyngeal (IX)

Vagus

Vagus (X)

Accessory

Accessory (XI)

Hypoglossal

Hypoglossal (XII)