From superficial to deep, put the following meninges and their related spaces in the correct order
Dura Mater
Subdural space
arachnoid mater
subarachnoid space
pia mater
The space that lies between the dura mater and the periosteum of the vertebrae, and houses areolar connective tissue, blood vessels, and adipose connective tissue is the ___________ space
Epidural
The tapering inferior end of the spinal cord is called the?
conus medullaris
This structure marks the official “end” of the spinal cord proper (usually at the level of the?)
first lumbar vertebrae
Inferior to this level, nerve roots collectively called the ________ project _____ from the spinal cord.
cauda equina; inferiorly
Within this “horse’s tail” is the ________. This is a thin strand of ______ that helps anchor the conus medullaris to the ______.
filum terminale; pia mater; coccyx
The most superior part of the spinal cord is the ____________ part.
Cervical
Serves as a communication route between left and right sides
Gray commissure
House cell bodies of autonomic motor neurons
Lateral horns
House cell bodies of somatic motor neurons
Anterior horns
House axons of sensory neurons and cell bodies of interneurons
Posterior horns
Anterior Rami
-Larger
-Innervates Limbs
-Innervate Anterior and Lateral portions of the trunk
-Form plexuses
Posterior Rami
-Smaller
-Innervates deep muscles of the back
-Innervates skin of the back
The area of the skin that is supplied with sensory innervation by a pair of spinal nerves is called a ___________.
Dermatome
Put the following events that occur in a reflex arc in the correct order.
-A sensory receptor detects a stimulus
-A sensory neuron conducts action potentials through the nerve to the spinal cord
-The sensory neuron synapses with an interneuron
-The interneuron synapses with a motor neuron
-The motor neuron conducts action potentials through the anterior root and spinal nerve to an effector organ
The simplest reflex; muscles contract in response to a stretch
Prevents contracting muscles from applying tension to tendons Golgi tendon reflex
Removes a body part from a painful stimulus
Response to a withdrawal reflex; causes extension of the opposite limb Crossed-extensor reflex
-Stretch reflex
-Golgi tendon reflex
-Withdrawal reflex
-Crossed-extensor reflex
Stepping on a piece of glass with the left foot will result in extension of the right leg to help maintain balance. This is an example of a(n) _____________ reflex.
contralateral
Which portion of a reflex arc is most likely to be located entirely within the central nervous system?
interneuron
Somatic Nervous System
-Voluntary Control
-Stimulates Skeletal muscle fibers
-one lower motor neuron
Autonomic Nervous System
-involuntary control
-two lower motor neurons
-innervates cardiac muscle and smooth muscle
Preganglionic axons are myelinated; postganglionic axons are
unmyelinated ...
Uses only one neuron to reach target
...
Requires two neurons to reach target...
Only one
synapse between the neuron and the target...
Conscious and
unconscious regulation of skeletal muscle...
Unconscious
regulation of smooth muscles, cardiac muscles, and glands...
-Autonomic nervous system
-Somatic motor nervous system
-Autonomic nervous system
-Somatic motor nervous system
-Somatic motor nervous system
-Autonomic nervous system
The cell bodies of the preganglionic neurons in the sympathetic division are located
in the lateral horns of the T1-L2 spinal cord segments.
Parasympathetic
-Digesting
-Defecation
-Diuresis
Sympathetic
-Running
-Stress
-Excitement
-Fight or Flight system
The pelvic splanchnic nerves are formed from branches of preganglionic parasympathetic axons housed within the ______ of the ____ spinal cord segments.
lateral gray regions; S2-S4
The pelvic splanchnic nerves innervate most of the
reproductive organs
One digestive organ innervated by the pelvic splanchnic nerve is the
large intestine
Which of the following are released from neurosecretory cells in the adrenal medulla as a result of sympathetic innervation?
-Epinephrine
-Norepinephrine
White Rami
-carry preganglionic sympathetic axons
-Associated with T1-L2 spinal nerves
-Similar to "entrance ramps"
-Myelinated
Gray Rami
-Carry postganglionic sympathetic axons
-connect to all spinal nerves
-similar to "exit ramps" from a highway
-Unmyelinated
The _____ are anterior to the vertebral column on the anterolateral surface of the aorta.
prevertebral ganglia
The paravertebral ganglia are also known as the
sympathetic trunk ganglia
These connect to form the left and right ___, which are anterior to the spinal nerves.
sympathetic trunks
If the neuron secretes acetylcholine, it is a(n) __________neuron.
If the neuron secretes epinephrine, it is a(n) __________ neuron.
cholinergic; adrenergic
Dual innervation describes a scenario in which a target organ has innervation from____.
If the divisions create opposite effects on the same target organ, it's called ___
If the divisions have complementary effects on the target organ or system, it's called cooperative innervation.
Since the parasympathetic division causes ____ and the sympathetic division causes _____, this is an example of antagonistic innervation.
-both division(s) of the ANS
-antagonistic innervation.
-cooperative innervation
-bronchoconstriction; bronchodilation
What systems are only innervated by the sympathetic nervous system?
-Most blood vessels
-Sweat glands in the trunk
-Arrector pili muscles in the skin
Autonomic reflexes enable the ANS to control what kinds of visceral functions?
-Smooth muscle contractions
-Secretion by glands
-Cardiac muscle contractions
Modality
the brain assumes that a signal from the olfactory epithelium must be for smell
Location
-Receptive field
-Concentration of receptors in a given area of skin
Intensity
-Firing frequency of sensory nerve fibers
-Number of nerve fibers firing
-Volume of sound
-Only the most sensitive receptors are stimulated by weak stimuli
Duration
-Changes in the firing frequency of sensory nerve impulses over time
-Tonic receptors
Large Receptive Field
-Detects general region of stimulus only
-Higher energy costs
Small Receptive Field
-Greater specificity of location
-More efficient use of surface area
-Lower energy cost
Tonic
-Respond continuously
-Sensitivity remains constant
-Nociceptors continuously detecting pain
-Inner ear cells detecting head position
Phasic
-Respond to change
-Sensitivity decreases over time
-Skin receptors detecting clothing
-Thermoreceptors adjusting to ambient temperature
Why is visceral pain sometimes localized incorrectly?
Visceral sensory neurons travel along the same pathway as many somatic sensory neurons.
Thoracic vertebrae
-Twelve vertebrae that articulate with ribs
-Costal facets articulate with ribs
-Rotation
Cervical vertebrae
-Seven vertebrae in the neck
-Contain transverse foramina
-Flexion & Lateral Bending
Lumbar vertebrae
-Five vertebrae in the low back
-Largest vertebrae
-Flexion & Lateral Bending
Sacrum
Five fused vertebrae
Coccyx
Four vertebrae comprising the "tailbone"
In which of the following regions does the spine form a lordosis?
-Cervical
-Lumbar
The jelly-like substance that fills the middle of the intervertebral discs is called the ______.
nucleus pulposus
Costal groove
Marks the path of nerves and vessels
Head of Rib
Articulates with vertebral bodies
Tubercle
Articulates with transverse costal facet
Angle
Where the shaft begins curving toward the sternum
Which of the following muscles is epaxial?
Erector spinae
What are the bilateral actions of the erector spinae muscles?
-Maintain posture
-Extend the vertebral column
Which are the muscles that elevate the ribs during inhalation?
-Serratus posterior superior
-External intercostals
The internally placed, dome-shaped muscle that forms a partition between the thoracic and abdominal cavities is the _____.
Diaphragm
Severing the posterior ramus of a spinal nerve may result in
losing feeling from the skin of the back.
Ribs that join the sternum directly by costal cartilages are called
true ribs.
From superficial to deep, place the muscles of the abdominal wall in the correct order.
-External oblique
-Internal oblique
-Transversus abdominis
Which of the following muscle aponeuroses contribute to the posterior rectus sheath ABOVE the arcuate line?
-Internal Abdominal Oblique
-Transversus Abdominus
The abdominal wall muscle that forms the inguinal ligament is the
external oblique.
Direct Inguinal hernia
passes through medial to deep inguinal ring
Femoral inguinal hernia
passes through inferior to the inguinal ligament
Indirect inguinal hernia
passes through the deep inguinal ring
The hip bones include
the ilium, the ischium, and pubis.
Female Pelvis
-shallow lesser pelvis
-coccyx moveable and tilted posteriorly
-wide sacrum
-wide greater sciatic notch
Male Pelvis
-Pubic Arch less than 90 degrees
-heart shaped pelvic inlet
-narrow false pelvis
-round obturator foramen
If you palpate the bony projection on the lateral side of your wrist, just proximal to the thumb, what part of the radius are you feeling?
Styloid process
Which of the following features is the most proximal feature of the ulna?
Olecranon
The cords of the brachial plexus are named by their location with respect to the
axillary artery.
Which ligaments are associated with the glenohumeral joint?
-Coracoacromial ligament
-Coracohumeral ligament
-Glenohumeral ligament
The glenohumeral joint exhibits
a low level of stability but a wide range of motion.
A shoulder separation involves the rupture of the ________ joint
acromioclavicular
Check all of the muscles that flex the arm at the glenohumeral joint.
-Pectoralis major
-Deltoid (anterior fibers)
-Coracobrachialis
-Biceps brachii (long head)
Which of the following muscles are considered rotator cuff muscles?
-Supraspinatus
-Teres minor
-Subscapularis
-Infraspinatus
After an injury, a patient has difficulty contracting his deltoid muscle. This indicates possible damage to the ___________ nerve.
axillary
One of the weakest parts of the shoulder is the part that lacks tendons of the rotator cuff. This weak area is the ______ aspect of the shoulder.
inferior
Head of radius
articulates with the capitulum of the humerus
Glenoid fossa of scapula
articulates with the head of the humerus
Trochlear notch of ulna
articulates with the trochlea of the humerus
Olecranon of ulna
articulates with olecranon fossa of the humerus
Which ligament is responsible for holding the head of the radius in place?
Anular ligament
The main ligament supporting the lateral aspect of the elbow is the
radial collateral ligament.
When the radius and ulna appear crossed, the forearm is said to be in a __________________ position.
pronated
Nursemaid's Elbow is the name of the condition that occurs when what happens?
The radial head is disarticulated
Which muscles are innervated by the radial nerve?
-Triceps brachii
-Anconeus
-Supinator
Which of the following structures can be found in the cubital fossa?
-Brachial Artery
-Median Nerve
-Biceps brachii Tendon
The metacarpophalangeal and interphalangeal joints are considered to be what class of synovial joint?
Condyloid
Many of the muscles in the anterior compartment of the forearm work to _______ the wrist, and they have their origin on the _______ epicondyle of the humerus.
flex, medial
What are muscles that function to abduct the hand at the wrist.
-Extensor carpi radialis brevis
-Extensor carpi radialis longus
-Flexor carpi radialis
Extension of the interphalangeal joints
Lumbricals
The Lumbricals insert on which of the following tendons?
Extensor digitorum communis
The ligament that forms the roof of the carpal tunnel is called the _____ ______ ligament.
transverse carpal
Injury of the motor recurrent branch of the Median nerve can cause which of the following symptoms?
thenar wasting
Axillary Nerve innervation
-Deltiod
-Teres Minor
Median Nerve innervation
-Thenar Muscles
Radial Nerve innervation
-Triceps brachii
-brachioradialis
Ulnar Nerve innervation
Flexor Carpi Ulnaris
Musculocutaneous Nerve innervation
-Biceps brachii
-Brachialis
Hand of Benediction (inability to flex first two fingers)
Median injury in the cubital fossa
Wrist drop (unable to extend wrist)
Radial nerve in the axilla
Erb palsy/Waiter's tip sign
Superior trunk of the brachial plexus
Parasthesia on medial side of the hand
Ulnar nerve at the cubital tunnel