Intro to Clinical Anatomy Flashcards
Epiphyseal Plates
You stop growing when it is sealed
Joints
is an articulation, or the plane of union or junction between two or more rigid components (bones, cartilage)
Syndesmosis
unites bones with sheet of fibrous tissue either a ligament of fibrous membrane
Gomphosis
type of fibrous joint in which a peg-like fibrous process stabilizes a tooth. Also provides proprioceptive info (how hard we chew, or clench teeth)
Synovial Joints
potential space that contains a small amount of synovial fluid (most common type of joint)
Atlanto-axial Joint
type of synovial joint. Pivot joint; rounded process of bone fits into a bony ligamentous socket, allowing rotation
Atlas
right under our skull (C1)
Axis
C2
Acromioclavicular Joint
type of synovial joint. Plane joints; allows gliding or sliding movements
Hip joint
Synovial joint. Ball and socket joint; (multiaxial) rounded head fits into a concavity, allowing movement on several axis)
Elbow Joint
Synovial. Hinge joint; allows flexion and extension only
Carpometacarpal Joint
Synovial. Saddle; biaxial, saddle-shaped and allows movement in 2 different planes
Metacarpophalangeal Joint
Synovial. Condyloid; biaxial, allows flextion and extension, abduction and adduction and circumduction
Skeletal Muscle
moves bones and other structures (the eyes)
Cardiac Striated Muscles
forms most of the walls of the heart and adjacent parts of the great vessels
Smooth Muscle
forms part of the walls of most vessels and hollow organs. Moves substances through viscera such as intestine, and controls movement through blood vessels
Skeletal Muscle
Static Support, provide heat, allow movement
Pennate Muscles
feather-like in the arrangement of their fascicles
Fusiform Muscles
spindle shaped
Parallel Muscles
fascicles lie parallel to long axis of muscle
Convergent Muscles
have a broad attachment from which the fascicles coverage to a single tendon
Circular Muscles
surround a body opening or orifice, constricting it when contracted
Digastric Muscles
features two bellies in series, sharing a common intermediate tendon
Skeletal Muscle Contraction
Shorten to 70% of resting length
Muscle Power
increases as the total number of muscle cells increases
Reflexive Contraction
automatic and voluntary controlled
Tonic Contraction
slight contraction (muscle tone) that does not produce movement or active resistance but gives muscle firmness
Phasic Contraction
Isometric - muscle length remains the same - no movement occurs but muscle tension is increased
Isotonic - muscle changes length to produce movement
Isotonic Contraction
Concentric - movement occurs due to muscle shortening
Eccentric - progressive relaxation of a contracted muscle
Motor Unit
consists of a single motor neuron and all muscle fibers innervated by it
Muscle Fiber
structural unit of a muscle
Endoymysium
connective tissue covering individual muscle fibers
Perimysium
covers a group of fibers
Epimysium
entire muscle is covered
Prime Mover (agonist)
main muscle responsible for producing a specific movement of the body
Fixators
steady the proximal parts of a limb while movements are occurring in distal parts
Synergist
complements the action of prime movers
Antagonist
muscle that opposes the action of a prime mover
Central Nervous System
Made up of brain and spinal cord
Peripheral nervous system
nerve fibers and cell bodies
Somatic Nervous System
voluntary nervous system, which carries sensation
Autonomic Nervous System
involuntary/visceral nervous system - supplies smooth muscle, viscera, and body cavities
Autonomic Nervous System
sympathetic - catabolic (prep body for fight or flight)
paraympathetic - anabolic (normal function & conserve energy)
Grey Matter
nerve cell bodies
White matter
interconnecting fiber tract systems
Spinal Cord 3 membranous layers
Deep to Superficial: pia mater, arachnoid mater, dura mater, collectively known as meninges
Meninges and CSF
protect CNS
CSF
located between the pia and arachnoid mater
Thoracic wall consists of…
skin, fascia, nerves, vessels, muscles, cartilages, and bones
Ribs
curved, flat bones. Each contains bone marrow (forms blood cells)
3 types of Ribs
- True (vertebrosternal) ribs (1st to 7th ribs): attach directly to the sternum anteriorly through their own costal cartilage
- False (vertebrochondral) ribs (8-10) have cartilage on anterior ends that are joined to the cartilage of the rib just superior to them
- Floating (free) ribs (11th and 12th ribs) do not connect with the sternum, instead end in the posterior abdominal musculature
Typical ribs (3rd - 9th)
head: wedge-shaped and 2 facets separated by crest of head
Neck: connects the head with the body (shaft) at the level of the tubercle
Tubercle: has a smooth articular part for articulating with corresponding transverse process of vertebra
Body (shaft): is thin, flat and curved along its length, inferior edge is costal groove; protects intercostal nerve and vessels
Atypical Ribs (1st, 2nd, and 10-12)
1st rib is broad: 1 facet on head shortest and most sharply curved, has scalene tubercle
2nd rib: thinner and more typical, except for the formations for attachment of serratus anterior and posterior scalene muscles (also double length of 1st rib)
10-12 ribs: only 1 facet on head
11-12 ribs: short have no necks or tubercles
Thoracic Vertebrae
typical vertebrae; independent and have bodies, vertebral arches, and seven processes for muscular and articular connections
Demifacets
Bilateral superior and inferior costal facets (demifacets)
Thoracic Vertebrae characteristics
- costal facets on their transverse processes for articulation with the tubercles of ribs
- long inferiorly slanting spinous processes that overlap the IV disc and vertebra below
Sternum
is flat, vertically elongated bone that forms the middle of the anterior part of the thoracic cage
Manubrium
superior part of sternum - roughly trapezoidal bone that lies at the level of the bodies of T3 and T4 vertebrae
Jugular Notch
thick superior border or manubrium
Clavicular Notch
on each side of manubrium - articulates with sternal end of clavicle
External Intercostal
Internal Intercostal
Innermost intercostal
SA: Inferior border of ribs
IA: Superior border of ribs below
Nerve: intercostal nerve
Action: elevate ribs
Transversus Thoracis
SA: Posterior surface of lower sternum
IA: internal surface of costal cartilages 2-6
Nerve: Intercostal nerve
Action: depress ribs
Subcostal
SA: internal surface of lower ribs near their angles
IA: superior borders of 2nd or 3rd ribs
Levatores Costarum
SA: Transverse Processes of T7-T11
IA: subjacent ribs between tubercle and angle
nerve: post rami of C8-T11
Action: elevates ribs
Serratus posterior superior
Sa: nuchal ligament
IA: superior borders of 2nd-4th ribs
Nerves: 2nd-5th intercostal nerves
Actions: elevate ribs
Serratus posterior inferior
SA: inferior borders of 8th-12th ribs
IA: spinous processes of T11-L2 vertebrae
nerve: intercostal, subcostal
Action: depress ribs
Mediastinum
central compartment of thoracic cavity
diaphragm posterior mediastinum
Tendinous Intersections
forms abs
External Oblique
superficial muscle
Internal Oblique
the intermediate muscle
Transverse Abdominis
Innermost muscle; fibers run horizontally
Rectus Abdominis
long, borad, strap-like muscle that is mostly enclosed in the rectus sheath
Pyramidalis
small triangular muscle that lies in the rectus sheath
Diaphragm
dome-shaped, separating the thoracic and abdominal cavities
Sternal Part of Diaphragm
consists of 2 muscular slips that attach to the posterior aspect of the xiphoid process of the sternum
Costal Part of Diaphragm
consts of wide muscular slips that attach to the internal surfaces of the inferior six costal cartilages and their adjoining ribs on each side
Lumbar part of Diaphragm
arising from 2 aponeurotic arches
Posterior Abdominal Wall composed of
- 5 lumbar vertebrae and IV discs
- post. ab wall muscles: psoas, quadratus lumborum, iliacus, transvers abdominis, and internal and external oblique muscles
- lumbar plexus
- fascia
- diaphragm
- fat, nerves, vessels
Psoas Major
SA: transverse processes of lumbar vertebrae
IA: strong tendon to lesser trochanter of femur
Nerve: lumbar plexus
Action: flexes thigh
Iliacus
SA: superior 2/3 of iliac fossa, ala of sacrum
IA: lesser trochanter of femur
nerve: femoral nerve
Action: flexes thigh and stabilize hip joint
Quadratus Lumborum
SA: Medial half of inferior border of 12th rib
IA: Iliolumbar ligament and internal lip of iliac crest
Nerve: anterior branches of T12 and L1-L4 nerves
Action: extends and laterally flexes vertebral column
Obturator Nerve (L2-L4):
emerges from the medial border of the psoas major and passes through the pelvis to the medial thigh, supplies adductor muscles
Femoral Nerve (L2-L4):
emerges from lateral border of psoas major and innervates iliacus, supply the flexors of the hip and extensors of knee
Lumbosacral Trunk (L4-L5):
passes over the ala (wing) of sacrum and descends into pelvis to participate formation of sacral plexus
Pia mater, dura mater, arachnoid mater - list superficial to deep
Dura Mater, Arachnoid Mater, Pia Mater