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Language and the Brain
Study of the Structures of the Anatomy of the Brain and Brain Injury
36
Communication
Undergraduate 3
01/26/2010

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Term
Dorsal
Definition
Toward the back.
Term
Ventral
Definition
Toward the stomach.
Term
Anterior
Definition
Toward the front end.
Term
Posterior
Definition
Toward the rear end.
Term
Rostral
Definition
Toward the head.
Term
Caudal
Definition
Toward the rear.
Term
Superior
Definition
Above another part.
Term
Inferior
Definition
Below another part.
Term
Lateral
Definition
Away from the midline
Term
Medial
Definition
Toward the midline.
Term
Proximal
Definition
Close to the point of origin.
Term
Distal
Definition
Located farther from the point of attachment.
Term
Ipsilateral
Definition
On the same side of the body.
Term
Contralateral
Definition
On the opposite side of the body.
Term
Coronal Plane
Definition
Frontal Plane. Shows brain structures as they would be seen from the front.
Term
Sagittal Plane
Definition
Shows brain structures as they would be seen from the side.
Term
Horizontal Plane
Definition
Transverse Plane. Shows structures how they would be seen from above.
Term
Lamina
Definition
Row or layer of cell bodies separated from other cell bodies by a layer of axons and dendrites.
Term
Column
Definition
Set of cells perpendicular to the surface of the cortex.
Term
Tract
Definition
Set of axons within the CNS. Also known as projection.
Term
Nerve
Definition
Set of axons in the periphery, either from CNS to a muscle or gland, or from a sensory neuron to the CNS.
Term
Nucleus
Definition
Cluster of neuron cell bodies within the CNS.
Term
Ganglion
Definition
Cluster of neuron cell bodies outside of the CNS.
Term
Gyrus
Definition
Areas of cortex on the surface of the brain in between "wrinkles."
Term
Sulcus
Definition
Fold or groove that separates one gyrus from another.
Term
Fissure
Definition
Long, deep sulcus.
Term
Afferent
Definition
Sensory signal from periphery to CNS (visual, auditory, tactual, and kinesethetic)
Term
Efferent
Definition
Motor signal from mononeuron-to-muscle.
Term
All-or-none
Definition
Amplitude of nerve impulse is the same regardless of the magnitude of the suprathreshold triggering threshold.
Term
Axon
Definition
Single extension from cell body carrying info away from cell to other neurons.
Term
Dendrite
Definition
extensions from cell body which are receptive surfaces of the cell; brings info into the cell.
Term
Synapse
Definition
Area composed of (1) presynaptic (axonal)terminal, postsynaptic membrane
Term
Anion
Definition
Negatively charged ion; mostly responsible for negative resting potential of all cells.
Term
Graded potentials
Definition
Electrical charges that vary in size over time & space; lead to either action potential or inhibition
Term
EPSP
Definition
Excitatory postsynaptic potential
Term
IPSP
Definition
inhibitory postsynaptic potential.
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