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39 Cards in this Set

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  • Back
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Saggital Plane

divides body into L & R

between the eyes

Transverse Plane

Divides body into Superior & Inferior

through the torso

Coronal Plane

divides body into Ventral & Dorsal

elevator doors

Anterior vs Posterior

Ant: Nose


Post: tail

Proximal vs Distal

Prox: Near center


Distal: Far from center

Cranial vs Caudal

Cranial: toward the head


Caudal: toward the tail

Afferent vs Efferent

Afferent: toward CNS


Efferent: away from CNS

A is for Approach


E is for Exit

CNS

Central Nervous System


Brain & Spine

PNS

Peripheral Nervous System


nerves emerging from CNS

Dendrites

carry nerve impulses into cell body

Afferent

Axons

conduct nerve impulses away from cell body

Efferent

What carries info across synaptic clefts?

Neurotransmitters

Myelin

~ insulates axons of nerves


~ speeds nerve impulses


~ grows until late childhood



~ damage → srs neuro probs (MS)

3 Anatomical Divisions of Brain

1. Cerebrum


2. Cerebellum


3. Brainstem

Brainstem (structure)

1. Diencephalon


2. Mesencephalon


3. Reticular Formation


4. Pons


5. Medulla Oblongata

5 components

Diencephalon

Part of Brainstem



Thalamus: integrates sensory info


● Hypothalamus: regulates emotion & motivation

2 parts

Mesencephalon

Middle part of Brainstem



Relay & Reflex centers for Aud f(x)


~ inf. colliculus controls auditory reflexes (adjusting ear to loudness of a sound)

aka Midbrain


Used at Mastodon Concert

Reticular Formation

Runs⬆&⬇Brainstem



● Primary mech for attn & consciousness


integrates sensory impulses flowing INTO, & motor impulses flowing OUT of the brain

"got the booty goin' UP... DOWN"

Pons

Part of Brainstem



● in front of cerebellum


● Connects Cerebellum halves & each half w/ opposite-side's cerebral hemi


● links cortex & medulla

Medulla

stem of Brainstem



● Controls breathing


Site where sensory & motor nerve fibers cross to opposite sides (contralateral innervation)

contralateral innervation

Brainstem (functions)

● 1st step in Information Processing


Sorts/Directs nerve impulses to apropriate higher centers of brain

sorting hat of the brain

Cerebellum

● lies behind brainstem & below Cerebrum


● regulates equilibrium, coordinates fine motor movements



● damage → often significant & resistant to therapy (dysarthria)

little brain

Pyramidal System

provides structural basis for volitional movements


~ control & speed of fine motor movements (like speech)


● postural control as well (breath support)

pyramids are strong as the shape provides structure & support

Extrapyramidal System

● Connects cerebral cortex, basal ganglia, and thalamus


● targets neurons involved in reflexes, locomotion, complex movements & postural control


~ involuntary movements

Longitudinal Fissure

delineates L & R hemis

Saggital

Fissure of Rolando

separates Frontal & Parietal lobes

Rolando's headband

Fissure of Sylvius

defines upper border of Temporal lobe

Sylvius separates speech centers

Gyri vs Fissures

Gyri = grooves on cortex



Fissures = valleys on cortex

Meninges

Sheaths & protects cerebrum & spinal cord

Association Fibers

connect areas w/in the same hemi

Commissural Fibers

connect corresponding areas in L&R hemis

Projection Fibers

connect CNS w/cortical sensory & motor areas

Internal Carotid Artery

supplies blood to areas of the brain involved in speech & Iang

Lobes of Brain

1. Frontal


2. Parietal


3. Occipital


4. Temporal

4

Frontal Lobe

● Activates & controls fine motor activity


● Controls executive f(x)



Motor Cortex: control lip, jaw, tongue & Larynx movement


Broca's Area (speech coordination)

2 things it controls


2 areas of note

Parietal Lobe

● Perceives perceptual info (touch, temp, pressure)


● Involved in comp of oral & written lang

2 things it does

Temporal Lobe

Auditory Cortex: interprets auditory info from both ears


Wernicke's Area: language comprehension

2 Areas of note

Occipital Lobe

Receives / Processes visual info

Where is the first step in info processing?

the brainstem