Animalscaretips
- Can the stretch reflex be elicited in a singly Pithed animal?
- Would an animal that has been brain Pithed brain destroyed by needle still have spinal reflexes?
- Is a stretch reflex a Polysynaptic reflex?
- What type of reflex is a stretch reflex?
- What test initiated the stretch reflex?
- How do we elicit a knee jerk reflex?
- Can a human be Pithed?
- How can you assess that frog is properly Pithed?
- What is a Pithed frog?
- Is the Myotatic reflex Monosynaptic?
- Why is this reflex classified as a Polysynaptic reflex?
- What is Monosynaptic stretch reflex?
- Where does the stretch reflex occur?
- What is inverse stretch reflex?
Can the stretch reflex be elicited in a singly Pithed animal?
CAN THE STRETCH REFLEX BE ELICITED IN A PITHED ANIMAL (THAT IS, AN ANIMAL IN WHICH THE BRAIN HAS BEEN DESTROYED)? YES, EVEN WITHOUT THE BRAIN A STRETCH REFLEX ONLY NEEDS A AFFERENT, CONTROL CENTER, AND MOTOR FIBERS TO BE ELICITED. THESE COMPONENTS STILL STAY INTACT IF THE BRAIN HAS BEEN DESTROYED.
Would an animal that has been brain Pithed brain destroyed by needle still have spinal reflexes?
Yes, Even without the brain a stretch reflex only needs an afferent control center, and motor fibers to be elicited. These components still stay intact if the brain has been destroyed.
Is a stretch reflex a Polysynaptic reflex?
The stretch reflex is a monosynaptic reflex that regulates muscle length through neuronal stimulation at the muscle spindle. The alpha motor neurons resist stretching by causing contraction, and the gamma motor neurons control the sensitivity of the reflex.
What type of reflex is a stretch reflex?
The stretch reflex is also referred to as the deep tendon reflex or myotatic reflex. It is a simple pre-programmed response by the human body in response to the muscle being passively stretched e.g. by a tendon hammer, or a sudden change in the ground surface.
What test initiated the stretch reflex?
The patellar reflex (knee jerk) is an example of the stretch reflex and it is used to determine the sensitivity of the stretch reflex. Reflexes can be tested as part of a neurological examination, often if there is an injury to the central nervous system. To test the reflex, the muscle should be in a neutral position.
How do we elicit a knee jerk reflex?
The normal knee-jerk reflex involves no input to or from the brain. The normal knee-jerk or, "patellar jerk," reflex is elicited when the knee is tapped below the knee cap (patella). Sensors that detect stretching of the tendon of this area send electrical impulses back to the spinal cord.
Can a human be Pithed?
The operation known as pithing (physical destruction of the brain to ensure rapid death following captive-bolt stunning) is no longer practised in UK slaughterhouses. It is then slid back and forth to cause maximum damage to the brain and upper spinal cord, a practice known as 'fiddling'. ...
How can you assess that frog is properly Pithed?
Test for reflexes to confirm that sensory perception has been destroyed and ensure that the spinal cord is still intact, although it is now in shock. In a normal frog, as soon as you touch its eyelid, it will blink. With no brain, there is no response. Pinch the frog's leg and it should withdraw as shown below.
What is a Pithed frog?
Pithing is also a procedure used in laboratories to immobilize a biological specimen, for instance a frog. A needle is inserted through the rear base of the skull and wiggled, destroying the brain.
Is the Myotatic reflex Monosynaptic?
The Myotatic Reflex Is a MonoSynaptic Reflex Between Ia Afferents and the α Motor Neuron. The myotatic reflex is the “knee-jerk” reflex in which a muscle contracts in direct response to its stretch. It is typically elicited by tapping on the tendon of a muscle, which deforms the tendon and stretches the muscle.
Why is this reflex classified as a Polysynaptic reflex?
It is like a polysynaptic spinal reflex because it is a motor response to sensory stimulation that is repeated the same way each time the “hardwired” reflex circuit is activated.
What is Monosynaptic stretch reflex?
The monosynaptic stretch reflex, or sometimes also referred to as the muscle stretch reflex, deep tendon reflex, is a reflex arc that provides direct communication between sensory and motor neurons innervating the muscle. ... This contraction allows the muscle to resist the force that initially caused the reflex.
Where does the stretch reflex occur?
Anatomy of the Stretch Reflex
Located within the belly of the muscle, between and parallel to the main muscle fibers, are muscle spindles. These muscle spindles are made up of spiral threads called intrafusal fibers, and nerve endings, both encased within a connective tissue sheath.
What is inverse stretch reflex?
The Golgi tendon reflex (also called inverse stretch reflex, autogenic inhibition, tendon reflex) is an inhibitory effect on the muscle resulting from the muscle tension stimulating Golgi tendon organs (GTO) of the muscle, and hence it is self-induced.
