Psych 377 First Midterm

Nuclei

Groups of Neurons in CNS

Tracts

Groups of axons in CNS

ganglia

cell body grouping axon bundles only in PNS

Nuclei

cell body groups in CNS

Rostral Caudal

Nose to tail axis of the body

synonymous ish with anterior posterior

Dorsal Ventral

Back-to-front axis of the body

synonymous ish with superior-inferior

Medial-lateral

Medial: toward the middle

Lateral: toward side

Ipsilateral

Structures on the same side of the body

eg pain receptors, as they are connected to the spinal cord reflex so it needs to be a quick response

Contralateral

structures on the opposite side of the body

Proximal

structures are close together

Distal

Structures are far apart

Afferent

Movement toward the CNS

outside affects body

Efferent

movement away from CNS

body has an effect on the outside

Coronal Section

Transverse(horizontal) Section of Brain

Sagittal Section

Cenbtral Nervous System

Spinal cord and brain

protected by bone

Peripheral Nervous System

Projects out of body

somatic nervous system ineracts with external world

autonomic nervous system is automatic stuff

Sympathetic and parasympathetic branches

Sympathetic branch

PNS, autonomic

fight, flight, freeze, fawn response

Parasympathetic Branch

PNS, autonomic

rest and digest

Dura Mater

tough outer coating meninges

Arachnoid Mater

web-like structure that connects dura and pia mater

Pia Mater

touch inner layer that adheres to surface of the brain

Blood brain barrier

chemical protection

astroglia hold cells of blood vessels tightly together

regulation of what molecules can exit the blood supply to enter brain