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Practical #2
Lab Practical #2
111
Anatomy
Undergraduate 2
03/11/2015

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Term
Endomysium
Definition
Surrounds each muscle fiber.
Between each muscle fiber.
Grout of the muscle fiber
Term
Fascicle
Definition
Bundle of muscle fibers
Term
Perimysium
Definition
Surrounds each fascicle.
Grout of the fascicle.
Term
Epimysium
Definition
Surrounds entire muscle.
Wrapping.
Term
Tendon
Definition
Connects muscles to other muscles AND muscles to bones.
Term
Masseter
Definition
Jaw muscle
Term
Temporalis
Definition
Muscle on the side of the skull.
Tempol
Term
Trapezius
Definition
Shoulder muscle. Connects back of shoulder to back.
Term
Sternocleidomastoid (Spell)
Definition
Anterior lateral surface of the neck. Right behind the ear on neck.
Flexes the head forward and rotates head towards shoulders.
Term
Pectoralis Major
Definition
Chest (Pecs).
Prime mover of arm flexion. Adducts and medially rotates arm.
Term
Digastric
Definition
Under chin. Opens mouth and depresses mandilbe. V-shaped.
Term
Deltoid
Definition
Outside of shoulder. Prime mover of arm abduction. Triangular muscle.
Term
External Intercostals
Definition
Superior border of ribs. Pulls ribs toward one another to elevate rib cage.
Helps breathing.
Term
Latissimus dorsi
Definition
Flat muscle of lower back. Wings.
Prime mover of arm extension.
Adducts and medially rotates arm. Brings arm down to strike.
Term
Bicep Brachii
Definition
Bicep muscle in arm. Two-headed muscle that bulges when forearm is flexed.
Flexion of the elbow and supination of the forearm.
Term
Tricep Brachii
Definition
Tricep in arm. Muscle on the posterior of the humerus. Three-headed. Forearm extensor.
Term
External Oblique
Definition
Muscle that runs downward on side of abs. Anterior surface of last 8 ribs. Compresses abdominal wall. Helps with trunk rotation.
Term
Internal Oblique
Definition
Under the external oblique. Contains more muscle fibers.
Term
Rectus Abdominis
Definition
Ab muscles. Extends from pubis to ribs. Surrounded by obliques. Flexes and rotates vertebral column.
Term
Gluteus Muscles
Definition
Butt muscle. Powerful thigh extensor. Not hamstring.
Term
Adductor Femoris
Definition
Thigh Muscle. Adduct and medially rotate thigh.
Term
Bicep Femoris
Definition
Most lateral muscle of the hamstring. Extends thigh and flexes knee. Two heads.
Term
Semitendinosus
Definition
Next to bicep femoris. More thin. Upper tibial shaft. Extends thigh, flex knee.
Hammy
Term
Semimembranosus
Definition
Muscle right behind the knee. Connects tibia and femur. Hammy
Term
Quadricep Femoris
Definition
Muscle that connects hip to knee. Extends knee and helps flex thigh.
Term
Gracills
Definition
Straplike muscle of medial thigh. Inner thigh. Adducts thigh; flexes and rotates leg. Works alot while walking.
Term
Sartorious
Definition
Straplike muscle that runs across surface of thigh to knee. Known as tailor's muscle. Helps cross legs, which tailors did.
Term
Gastrocnemius
Definition
Calf muscle. Two heads, inner and outer. Flex foot when knee is extended.
Term
Tibialis Anterior
Definition
Muscle next to tibia (Shin). Prime move of dorsiflexion.
Term
Tonus
Definition
constant state of slight muscle contraction even when the muscle is relaxed
Term
Tetanus
Definition
Single sustained contraction with no evidence of relaxation; emonstrates maximum force generated by a skeletal muscle
Term
Wave summation
Definition
Subsequent stimuli are delivered to a muscle that is already in a partially
contracted state; increases strength of a contraction
Term
Muscle fatigue
Definition
Muscle is unable to contract even though it is being stimulated
Term
Latent period
Definition
Period of no contraction; stimulus is being applied but has not yet contracted; muscle
cannot contract instantaneously
Term
Period of contraction
Definition
Muscle fibers shorten; muscular tension increases
Term
Period of Relaxation
Definition
Following a period of contraction; muscle fibers relax and lengthen. Increased frequency of the stimulus results in increased rate of contraction
Term
Central Nervous System (CNS)
Definition
Consists of brain and spinal cord
Term
Peripheral Nervous System (PNS)
Definition
All the nerves outside the CNS.
Term
Afferent Neurons
Definition
Sensory. The skin, skeletal muscles, joints and some organs.
Term
Efferent Neurons
Definition
Motor. Always located in the CNS. Carries impulses from the CNS to the body's muscles.
Term
Cerebrum
Definition
Muscly part of the brain.
Term
Sulci
Definition
Shallow grooves on the cerebrum
Term
Gyri
Definition
Elevated ridges of tissues on the Cerebrum
Term
Longitudinal Fissure
Definition
Splits the brain down the middle.
Term
Frontal Lobe
Definition
Higher level thinking. Front of the brain.
Term
Parietal Lobe
Definition
Spatial sense, position or touch. Top-Back of brain.
Term
Occipital Lobe
Definition
Vision and visual processing. Back of the brain.
Term
Temporal Lobe
Definition
Responsible for language, speech, hearing, emotions and new memories. Center of brain, low part of cerebrum.
Term
Corpus Callosum
Definition
Structure that allows the left and right side of the brain to communicate.
Term
Thalamus
Definition
Relay Station
Term
Intermediate Mass
Definition
Connects Thalamus to both sides of the brain.
Term
Pineal Gland
Definition
Endocrine Gland. Responsible for sleep regulation. Melatonin is created and released here.
Term
Hypothalamus
Definition
Area above the pituitary gland. The floor and the inferolateral walls of the third ventricle.
Term
Pituitary Gland
Definition
Only in a brain with dura mater. Sac-like under the Hypothalamus
Term
Optic Chiasm
Definition
Pointy thing under the Hypothalamus. Located beneath the brain. Where optic nerves cross over.
Term
Midbrain
Definition
Middle of the brain.
Term
Pons
Definition
Motor and sensory fiber tracts. Big bulge above the medulla and spinal cord.
Term
Medulla
Definition
Lowest brain stem region.
Term
Cerebellum
Definition
Cauliflower looking lobe in back-bottom part of the brain. Projects dorsally from under the occipital lobes.
Term
Arbor Vitae
Definition
Lining of the cerebellum
Term
Cerebrospinal Fluid
Definition
Produced in and circulates through the ventricles of the brain
Term
I. Olfactory Nerve
Definition
Sensory. Smell.
Term
II. Optic Nerve
Definition
Sensory. Eye movement.
Term
III. Occulomotor Nerve
Definition
Motor. Eye Movement.
Term
IV. Trochlear Nerve
Definition
Motor. Eye Movement
Term
V. Trigeminal Nerve
Definition
Sensory and Motor. Facial Sensation and Chewing.
Term
VI. Abducens Nerve
Definition
Motor. Eye Movement
Term
VII. Facial Nerve
Definition
Sensory and Motor. Taste and facial expression.
Term
VIII. Vestibulocochlear Nerve
Definition
Sensory. Balance and Hearing.
Term
IX. Glossopharyngeal Nerve
Definition
Sensory and Motor. Taste and swallowing.
Term
X. Vagus Nerve
Definition
Sensory and Motor. Internal Organs.
Term
XI. Accessory Nerve
Definition
Motor. Turning head.
Term
XII. Hypoglossal Nerve
Definition
Motor. Tongue movement.
Term
Gray Matter of the Spine
Definition
Looks like butterfly or letter H
Term
White Matter
Definition
Surrounds the gray matter.
Term
Central Canal
Definition
Little hole that runs through the spinal cord.
Term
Dorsal Root
Definition
Connects Spinal cord to spinal nerves. Fans out into dorsal rootlets.
Term
Ventral Root
Definition
Connects Spinal Cord to spinal nerves. Derived from several ventral rootlets. More connections.
Term
Dorsal root Ganglion
Definition
Enlarged area of the dorsal root. Closer to the spinal nerves.
Term
Reflex Arc
Definition
Sensory neuron tells CNS.
Motor neuron conducts impulses from CNS. The muscle/joint respond to the motor neuron. These are reflexes.
Term
Sclera
Definition
White of the Eye
Term
Choroid
Definition
Blood-rich nutritive region containing a dark pigment that prevents light from Prevents light from scattering in eye. Surrounds the retina and is layer inside of Sclera.
Term
Retina
Definition
Inside the Choroid. Creates an image of the visual.
Term
Cornea
Definition
First layer of the front of the eyeball. Where light enters the eye. Front Door.
Term
Ciliary body
Definition
Black pigmented body that appears to be a halo encircling the lens. Brown part on model
Term
Iris
Definition
Eye color
Term
Pupil
Definition
Opening for light passage into eye. Black hole in Iris.
Term
Suspensory ligament
Definition
Holds the lens in position vertically
Term
Lens
Definition
Focuses the lens on the retina. Marble is behind the lens.
Term
Optic Nerve
Definition
Tight bundle of fibers from the axons in the retina. Behind the Eyeball.
Term
Fovea Centralis
Definition
High Content of cones. Yellow Spot. Tiny pit that has the greatest visual acuity.
Term
Optic Disk
Definition
Blind Spot. Back of Eyeball. In front of Optic Nerve.
Term
Lacrimal glands
Definition
Tear Production
Term
Myopia
Definition
Nearsighted. Only see close
Term
Hyperopia
Definition
Farsighted. Only see far.
Term
Ear Lobe/Pinna
Definition
Skin covered cartilage near the opening of the canal.
Term
Ear Canal
Definition
Short, narrow chamber that is carved into the temporal bone.
Term
Ear Drum
Definition
First thing you see going into ear canal
Term
Ear Ossicles
Definition
Three bones which amplify and transmit sound
Term
Malleus
Definition
Hammer in the ear. Closest to ear drum.
Term
Incus
Definition
Anvil of the ear. Second to the ear drum.
Term
Stapes
Definition
Stirrup of the ear. Third to the ear drum.
Term
Eustachian Tube
Definition
Auditory tube that connects sound from ear drum to nerves. When you yawn or swallow, the tube opens up. This causes a false ear drum vibration.
Term
Vestibule
Definition
Involved in Equilibrium (Balance). Nerve in Inner Ear.
Term
Cochlea
Definition
Snail shell looking. Contains sensory receptors for hearing.
Term
Semicircular Canals
Definition
Involved in Equilibrium. Little open circles in Inner Ear.
Term
Conduction Deafness
Definition
Physical or mechanical deaf problem.
Term
Nerve Deafness
Definition
Born deaf.
Term
Dura Mater
Definition
Most external brain meninge
Term
Pia Mater
Definition
Beneath the dura mater. Where Spinal fluid is produced.
Term
Arachnoid Membrane
Definition
Most internal meninge. Wraps all the grooves and ridges of the brain.
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